./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_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_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:18:14,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:18:15,044 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 16:18:15,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:18:15,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:18:15,073 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:18:15,074 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:18:15,075 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:18:15,075 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:18:15,076 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:18:15,077 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:18:15,077 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:18:15,078 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:18:15,078 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:18:15,079 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:18:15,080 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:18:15,080 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:18:15,081 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:18:15,081 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:18:15,082 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:18:15,082 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:18:15,084 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:18:15,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 16:18:15,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 16:18:15,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:18:15,086 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:18:15,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:18:15,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:18:15,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:18:15,087 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 16:18:15,088 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 16:18:15,088 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 16:18:15,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:18:15,089 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:18:15,089 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:18:15,089 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:18:15,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:18:15,090 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:18:15,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:18:15,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:18:15,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:18:15,090 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:18:15,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:18:15,091 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:18:15,091 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:18:15,091 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:18:15,091 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:18:15,092 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:18:15,092 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_bc53dd7c-35c2-46db-93df-ce0a4f578769/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2023-12-02 16:18:15,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:18:15,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:18:15,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:18:15,322 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:18:15,322 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:18:15,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-12-02 16:18:18,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:18:18,373 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:18:18,373 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-12-02 16:18:18,390 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/6550e8266/fbfe8ac3062147b2bb492448f16e745b/FLAG91a879da0 [2023-12-02 16:18:18,406 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/6550e8266/fbfe8ac3062147b2bb492448f16e745b [2023-12-02 16:18:18,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:18:18,410 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:18:18,412 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:18:18,412 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:18:18,417 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:18:18,418 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:18" (1/1) ... [2023-12-02 16:18:18,419 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f4ad09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:18, skipping insertion in model container [2023-12-02 16:18:18,420 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:18" (1/1) ... [2023-12-02 16:18:18,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:18:18,819 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:18:18,838 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 16:18:18,838 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b5df1c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:18, skipping insertion in model container [2023-12-02 16:18:18,839 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:18:18,839 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 16:18:18,841 INFO L158 Benchmark]: Toolchain (without parser) took 429.94ms. Allocated memory is still 159.4MB. Free memory was 114.0MB in the beginning and 99.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 16:18:18,842 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:18:18,842 INFO L158 Benchmark]: CACSL2BoogieTranslator took 427.33ms. Allocated memory is still 159.4MB. Free memory was 114.0MB in the beginning and 99.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 16:18:18,844 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory was 51.9MB in the beginning and 51.8MB in the end (delta: 142.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 427.33ms. Allocated memory is still 159.4MB. Free memory was 114.0MB in the beginning and 99.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:18:20,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:18:20,704 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 16:18:20,710 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:18:20,710 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:18:20,738 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:18:20,738 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:18:20,739 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:18:20,739 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:18:20,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:18:20,740 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:18:20,741 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:18:20,742 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:18:20,742 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:18:20,743 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:18:20,743 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:18:20,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 16:18:20,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 16:18:20,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:18:20,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:18:20,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:18:20,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:18:20,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:18:20,748 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 16:18:20,748 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 16:18:20,749 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 16:18:20,749 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:18:20,750 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:18:20,750 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 16:18:20,751 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 16:18:20,751 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:18:20,751 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:18:20,752 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:18:20,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:18:20,752 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 16:18:20,752 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:18:20,752 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:18:20,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:18:20,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:18:20,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:18:20,754 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 16:18:20,754 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:20,754 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:18:20,754 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:18:20,754 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:18:20,755 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_bc53dd7c-35c2-46db-93df-ce0a4f578769/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2023-12-02 16:18:21,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:18:21,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:18:21,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:18:21,070 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:18:21,070 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:18:21,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-12-02 16:18:23,995 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:18:24,296 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:18:24,297 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-12-02 16:18:24,318 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/6fedc38ca/786848c70d714a9d9a9f6f77bb7c8b85/FLAGfc086082f [2023-12-02 16:18:24,336 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/data/6fedc38ca/786848c70d714a9d9a9f6f77bb7c8b85 [2023-12-02 16:18:24,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:18:24,342 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:18:24,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:18:24,344 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:18:24,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:18:24,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:24,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6daa22d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24, skipping insertion in model container [2023-12-02 16:18:24,351 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:24,409 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:18:24,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:18:24,790 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 16:18:24,809 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:18:24,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:18:24,870 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:18:24,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:18:24,959 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 16:18:24,966 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:18:24,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24 WrapperNode [2023-12-02 16:18:24,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:18:24,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:18:24,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:18:24,968 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:18:24,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,002 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,029 INFO L138 Inliner]: procedures = 169, calls = 88, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 95 [2023-12-02 16:18:25,029 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:18:25,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:18:25,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:18:25,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:18:25,039 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,045 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,056 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,061 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,063 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:18:25,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:18:25,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:18:25,069 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:18:25,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (1/1) ... [2023-12-02 16:18:25,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:18:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:25,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:18:25,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:18:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 16:18:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 16:18:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2023-12-02 16:18:25,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2023-12-02 16:18:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:18:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:18:25,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:18:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:18:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:18:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 16:18:25,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:18:25,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:18:25,340 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:18:25,343 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:18:25,677 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:18:25,722 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:18:25,722 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 16:18:25,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:25 BoogieIcfgContainer [2023-12-02 16:18:25,723 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:18:25,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:18:25,726 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:18:25,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:18:25,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:18:24" (1/3) ... [2023-12-02 16:18:25,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72440b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:18:25, skipping insertion in model container [2023-12-02 16:18:25,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:18:24" (2/3) ... [2023-12-02 16:18:25,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72440b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:18:25, skipping insertion in model container [2023-12-02 16:18:25,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:25" (3/3) ... [2023-12-02 16:18:25,732 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test11_1.i [2023-12-02 16:18:25,749 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:18:25,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-12-02 16:18:25,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:18:25,799 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;@201d8059, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:18:25,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-12-02 16:18:25,803 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 16:18:25,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 16:18:25,810 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:25,810 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:25,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:25,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:25,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1692559857, now seen corresponding path program 1 times [2023-12-02 16:18:25,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:25,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112469445] [2023-12-02 16:18:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:25,828 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 16:18:25,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:25,830 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:25,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:25,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:18:25,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:25,997 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 16:18:25,997 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:25,998 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:25,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112469445] [2023-12-02 16:18:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112469445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:25,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:18:25,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:18:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109310494] [2023-12-02 16:18:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:26,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:18:26,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:18:26,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:26,036 INFO L87 Difference]: Start difference. First operand has 80 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 16:18:26,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:26,243 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2023-12-02 16:18:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:18:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2023-12-02 16:18:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:26,256 INFO L225 Difference]: With dead ends: 147 [2023-12-02 16:18:26,256 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 16:18:26,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:26,262 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 62 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:26,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 328 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:18:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 16:18:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 83. [2023-12-02 16:18:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 16:18:26,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-12-02 16:18:26,310 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2023-12-02 16:18:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:26,311 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-12-02 16:18:26,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 16:18:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-12-02 16:18:26,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 16:18:26,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:26,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:26,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:26,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:26,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:26,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:26,516 INFO L85 PathProgramCache]: Analyzing trace with hash -805056176, now seen corresponding path program 1 times [2023-12-02 16:18:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:26,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002295118] [2023-12-02 16:18:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:26,517 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 16:18:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:26,519 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:26,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:18:26,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:26,636 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 16:18:26,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:26,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002295118] [2023-12-02 16:18:26,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002295118] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:26,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:18:26,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:18:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876170465] [2023-12-02 16:18:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:26,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:18:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:18:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:18:26,640 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 16:18:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:26,961 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2023-12-02 16:18:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:18:26,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 10 [2023-12-02 16:18:26,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:26,964 INFO L225 Difference]: With dead ends: 148 [2023-12-02 16:18:26,964 INFO L226 Difference]: Without dead ends: 146 [2023-12-02 16:18:26,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:18:26,966 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 62 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:26,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:18:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-12-02 16:18:26,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 79. [2023-12-02 16:18:26,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.829268292682927) internal successors, (75), 70 states have internal predecessors, (75), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 16:18:26,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-12-02 16:18:26,979 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 10 [2023-12-02 16:18:26,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:26,980 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-12-02 16:18:26,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 16:18:26,980 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-12-02 16:18:26,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 16:18:26,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:26,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:26,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:27,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash -917501701, now seen corresponding path program 1 times [2023-12-02 16:18:27,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:27,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539971327] [2023-12-02 16:18:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:18:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:27,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:27,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:18:27,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:27,282 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:27,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:27,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539971327] [2023-12-02 16:18:27,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539971327] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:27,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:18:27,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:18:27,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669825928] [2023-12-02 16:18:27,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:27,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:18:27,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:27,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:18:27,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:27,285 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 16:18:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:27,435 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2023-12-02 16:18:27,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:18:27,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 16:18:27,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:27,437 INFO L225 Difference]: With dead ends: 143 [2023-12-02 16:18:27,438 INFO L226 Difference]: Without dead ends: 143 [2023-12-02 16:18:27,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:27,439 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 59 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:27,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 405 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:18:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-12-02 16:18:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 83. [2023-12-02 16:18:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 16:18:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-12-02 16:18:27,451 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2023-12-02 16:18:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:27,452 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-12-02 16:18:27,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 16:18:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-12-02 16:18:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 16:18:27,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:27,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:27,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,654 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:27,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash -917501717, now seen corresponding path program 1 times [2023-12-02 16:18:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:27,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843077569] [2023-12-02 16:18:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:27,656 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 16:18:27,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:27,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:27,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:18:27,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:27,766 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 16:18:27,941 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:18:27,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:18:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:27,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:30,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:30,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843077569] [2023-12-02 16:18:30,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843077569] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:30,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239909511] [2023-12-02 16:18:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:30,749 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:18:30,750 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:18:30,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 16:18:30,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:30,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:18:30,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:30,893 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 16:18:30,928 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 16:18:30,953 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:18:30,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:18:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 16:18:30,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:35,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239909511] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:35,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052923337] [2023-12-02 16:18:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:35,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:35,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:35,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:35,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:18:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:35,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:18:35,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:35,293 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 16:18:35,370 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:18:35,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:18:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:35,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:39,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052923337] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:39,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:18:39,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-12-02 16:18:39,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203390371] [2023-12-02 16:18:39,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:18:39,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:18:39,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:39,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:18:39,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 16:18:39,597 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:18:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:40,400 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2023-12-02 16:18:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:18:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2023-12-02 16:18:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:40,402 INFO L225 Difference]: With dead ends: 121 [2023-12-02 16:18:40,402 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 16:18:40,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-12-02 16:18:40,404 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:40,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 274 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 305 Invalid, 0 Unknown, 130 Unchecked, 0.7s Time] [2023-12-02 16:18:40,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 16:18:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2023-12-02 16:18:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 81 states have internal predecessors, (92), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-02 16:18:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-12-02 16:18:40,414 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 16 [2023-12-02 16:18:40,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:40,414 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-12-02 16:18:40,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:18:40,415 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-12-02 16:18:40,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 16:18:40,416 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:40,416 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:40,419 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:18:40,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:18:40,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 16:18:41,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:41,019 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:41,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:41,019 INFO L85 PathProgramCache]: Analyzing trace with hash -917501716, now seen corresponding path program 1 times [2023-12-02 16:18:41,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:41,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781147773] [2023-12-02 16:18:41,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:41,020 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 16:18:41,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:41,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:41,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:41,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 16:18:41,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:41,086 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 16:18:41,094 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 16:18:41,253 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:18:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:41,282 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 16:18:41,298 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:18:41,299 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 16:18:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 16:18:41,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:41,593 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781147773] [2023-12-02 16:18:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781147773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1327666063] [2023-12-02 16:18:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:41,594 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:41,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:18:41,595 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:18:41,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 16:18:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:41,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 16:18:41,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:41,714 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 16:18:41,721 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 16:18:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:41,827 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 16:18:41,842 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:18:41,843 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 16:18:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 16:18:41,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:44,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1327666063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454950732] [2023-12-02 16:18:44,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:44,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:44,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:44,042 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:44,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:18:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:44,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 16:18:44,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:44,116 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 16:18:44,123 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 16:18:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:18:44,211 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 16:18:44,224 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:18:44,225 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 16:18:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 16:18:44,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:46,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454950732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:46,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:18:46,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-02 16:18:46,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639756146] [2023-12-02 16:18:46,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:18:46,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:18:46,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:46,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:18:46,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=70, Unknown=1, NotChecked=16, Total=110 [2023-12-02 16:18:46,435 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:18:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:47,305 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2023-12-02 16:18:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:18:47,305 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-12-02 16:18:47,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:47,307 INFO L225 Difference]: With dead ends: 203 [2023-12-02 16:18:47,307 INFO L226 Difference]: Without dead ends: 203 [2023-12-02 16:18:47,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=31, Invalid=104, Unknown=1, NotChecked=20, Total=156 [2023-12-02 16:18:47,308 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 123 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:47,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 616 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 583 Invalid, 0 Unknown, 229 Unchecked, 0.8s Time] [2023-12-02 16:18:47,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-12-02 16:18:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 130. [2023-12-02 16:18:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 85 states have (on average 1.8) internal successors, (153), 112 states have internal predecessors, (153), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (20), 15 states have call predecessors, (20), 12 states have call successors, (20) [2023-12-02 16:18:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2023-12-02 16:18:47,319 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 16 [2023-12-02 16:18:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:47,320 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2023-12-02 16:18:47,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:18:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2023-12-02 16:18:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 16:18:47,321 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:47,321 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:47,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:47,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 16:18:47,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:18:47,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:47,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:47,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1210904724, now seen corresponding path program 1 times [2023-12-02 16:18:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:47,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144472705] [2023-12-02 16:18:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:47,923 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 16:18:47,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:47,924 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:47,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:47,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:47,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:18:47,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:48,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:18:48,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:48,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144472705] [2023-12-02 16:18:48,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144472705] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:18:48,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:18:48,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:18:48,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177454880] [2023-12-02 16:18:48,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:18:48,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:18:48,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:18:48,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:48,004 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:18:48,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:48,076 INFO L93 Difference]: Finished difference Result 115 states and 155 transitions. [2023-12-02 16:18:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:18:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-12-02 16:18:48,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:48,077 INFO L225 Difference]: With dead ends: 115 [2023-12-02 16:18:48,078 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 16:18:48,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:18:48,079 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:48,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 319 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:18:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 16:18:48,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-12-02 16:18:48,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.7945205479452055) internal successors, (131), 99 states have internal predecessors, (131), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:18:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2023-12-02 16:18:48,085 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 16 [2023-12-02 16:18:48,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:48,086 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2023-12-02 16:18:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 16:18:48,086 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2023-12-02 16:18:48,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 16:18:48,086 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:48,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:48,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Forceful destruction successful, exit code 0 [2023-12-02 16:18:48,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:48,287 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:48,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:48,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1785245139, now seen corresponding path program 1 times [2023-12-02 16:18:48,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:48,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573597182] [2023-12-02 16:18:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:48,288 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 16:18:48,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:48,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:48,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:48,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:18:48,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:48,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:48,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573597182] [2023-12-02 16:18:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573597182] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [192942486] [2023-12-02 16:18:48,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:48,573 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:48,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:18:48,574 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:18:48,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 16:18:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:48,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:18:48,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:48,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [192942486] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935585405] [2023-12-02 16:18:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:48,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:48,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:48,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:18:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:48,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:18:48,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:18:48,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:48,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935585405] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:48,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:18:48,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 16:18:48,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289354651] [2023-12-02 16:18:48,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:18:48,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:18:48,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:48,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:18:48,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:18:48,874 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 16:18:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:49,148 INFO L93 Difference]: Finished difference Result 116 states and 155 transitions. [2023-12-02 16:18:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:18:49,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-12-02 16:18:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:49,150 INFO L225 Difference]: With dead ends: 116 [2023-12-02 16:18:49,150 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 16:18:49,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:18:49,151 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 120 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:49,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 227 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:18:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 16:18:49,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-12-02 16:18:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.7466666666666666) internal successors, (131), 99 states have internal predecessors, (131), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:18:49,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2023-12-02 16:18:49,159 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 17 [2023-12-02 16:18:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:49,159 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2023-12-02 16:18:49,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 16:18:49,160 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2023-12-02 16:18:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 16:18:49,161 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:49,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:49,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:49,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 16:18:49,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:18:49,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:49,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:49,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash 342226559, now seen corresponding path program 1 times [2023-12-02 16:18:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:49,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1043845577] [2023-12-02 16:18:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:49,764 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 16:18:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:49,765 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:49,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:49,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:18:49,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:49,917 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~c11~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base|) (_ bv0 1)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv0 1))))) is different from true [2023-12-02 16:18:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:49,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:49,999 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 16:18:50,000 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 43 treesize of output 38 [2023-12-02 16:18:52,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1043845577] [2023-12-02 16:18:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1043845577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1839239260] [2023-12-02 16:18:52,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:52,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:18:52,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:18:52,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 16:18:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:52,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:18:52,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:52,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:52,458 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 16:18:52,459 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 43 treesize of output 38 [2023-12-02 16:18:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1839239260] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808810204] [2023-12-02 16:18:54,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:54,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:54,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:54,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:54,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 16:18:54,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:54,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:18:54,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:54,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:54,771 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 16:18:54,771 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 43 treesize of output 38 [2023-12-02 16:18:56,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808810204] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:18:56,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:18:56,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2023-12-02 16:18:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360775703] [2023-12-02 16:18:56,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:18:56,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:18:56,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:56,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:18:56,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=86, Unknown=2, NotChecked=18, Total=132 [2023-12-02 16:18:56,894 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 16:18:57,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:57,426 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2023-12-02 16:18:57,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:18:57,427 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-12-02 16:18:57,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:57,429 INFO L225 Difference]: With dead ends: 168 [2023-12-02 16:18:57,429 INFO L226 Difference]: Without dead ends: 163 [2023-12-02 16:18:57,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=33, Invalid=101, Unknown=2, NotChecked=20, Total=156 [2023-12-02 16:18:57,430 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 100 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:57,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 411 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 339 Invalid, 0 Unknown, 153 Unchecked, 0.5s Time] [2023-12-02 16:18:57,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-12-02 16:18:57,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 109. [2023-12-02 16:18:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 95 states have internal predecessors, (125), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2023-12-02 16:18:57,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2023-12-02 16:18:57,436 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 20 [2023-12-02 16:18:57,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:57,436 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2023-12-02 16:18:57,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 16:18:57,436 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2023-12-02 16:18:57,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 16:18:57,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:57,437 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:57,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 16:18:57,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 16:18:57,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:58,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:58,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:58,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:58,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1237891212, now seen corresponding path program 1 times [2023-12-02 16:18:58,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:58,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1047165045] [2023-12-02 16:18:58,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:58,039 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 16:18:58,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:58,040 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:58,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:58,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:18:58,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:58,101 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 16:18:58,148 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 16:18:58,163 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:18:58,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:18:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 16:18:58,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:58,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:18:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1047165045] [2023-12-02 16:18:58,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1047165045] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:58,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1885092034] [2023-12-02 16:18:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:58,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:18:58,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:18:58,313 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:18:58,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 16:18:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:18:58,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:58,430 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 16:18:58,478 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:18:58,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:18:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 16:18:58,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:58,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1885092034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185746524] [2023-12-02 16:18:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:58,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:58,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:18:58,636 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:18:58,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 16:18:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:58,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:18:58,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:58,722 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 16:18:58,789 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:18:58,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:18:58,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:58,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:18:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:18:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185746524] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:18:58,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:18:58,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-12-02 16:18:58,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910570730] [2023-12-02 16:18:58,941 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:18:58,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:18:58,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:18:58,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:18:58,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 16:18:58,942 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:18:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:18:59,276 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2023-12-02 16:18:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:18:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-12-02 16:18:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:18:59,278 INFO L225 Difference]: With dead ends: 153 [2023-12-02 16:18:59,278 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 16:18:59,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-12-02 16:18:59,279 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 52 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:18:59,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 227 Invalid, 0 Unknown, 120 Unchecked, 0.3s Time] [2023-12-02 16:18:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 16:18:59,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 122. [2023-12-02 16:18:59,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.7439024390243902) internal successors, (143), 105 states have internal predecessors, (143), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2023-12-02 16:18:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2023-12-02 16:18:59,286 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 24 [2023-12-02 16:18:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:18:59,287 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2023-12-02 16:18:59,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:18:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2023-12-02 16:18:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 16:18:59,288 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:18:59,288 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:18:59,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-02 16:18:59,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:59,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 16:18:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:18:59,889 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:18:59,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:18:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1237891213, now seen corresponding path program 1 times [2023-12-02 16:18:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:18:59,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [205210581] [2023-12-02 16:18:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:18:59,890 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 16:18:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:18:59,891 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:59,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:18:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:18:59,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 16:18:59,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:18:59,965 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 16:19:00,055 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2023-12-02 16:19:00,074 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 16:19:00,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 16:19:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 16:19:00,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:00,280 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:00,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [205210581] [2023-12-02 16:19:00,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [205210581] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:00,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [308392704] [2023-12-02 16:19:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:00,280 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:00,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:19:00,281 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:19:00,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 16:19:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:00,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 16:19:00,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:00,409 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 16:19:00,414 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 16:19:00,556 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:19:00,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:00,574 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 16:19:00,584 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:00,585 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 16:19:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 16:19:00,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:00,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [308392704] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:00,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159364138] [2023-12-02 16:19:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:00,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:00,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:00,768 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:00,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 16:19:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:00,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 16:19:00,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:00,852 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 16:19:00,859 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 16:19:00,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:00,947 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 16:19:00,960 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:00,960 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 16:19:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 16:19:00,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:01,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159364138] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:01,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:19:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-12-02 16:19:01,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366308712] [2023-12-02 16:19:01,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:19:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:01,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:19:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=173, Unknown=2, NotChecked=54, Total=272 [2023-12-02 16:19:01,213 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:19:02,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:02,021 INFO L93 Difference]: Finished difference Result 234 states and 312 transitions. [2023-12-02 16:19:02,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:19:02,021 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2023-12-02 16:19:02,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:02,023 INFO L225 Difference]: With dead ends: 234 [2023-12-02 16:19:02,023 INFO L226 Difference]: Without dead ends: 234 [2023-12-02 16:19:02,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=224, Unknown=2, NotChecked=62, Total=342 [2023-12-02 16:19:02,024 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 103 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:02,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 600 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 458 Invalid, 0 Unknown, 390 Unchecked, 0.7s Time] [2023-12-02 16:19:02,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-12-02 16:19:02,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 168. [2023-12-02 16:19:02,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 122 states have (on average 1.7868852459016393) internal successors, (218), 145 states have internal predecessors, (218), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 16:19:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 257 transitions. [2023-12-02 16:19:02,031 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 257 transitions. Word has length 24 [2023-12-02 16:19:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:02,031 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 257 transitions. [2023-12-02 16:19:02,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:19:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 257 transitions. [2023-12-02 16:19:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 16:19:02,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:02,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:02,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:02,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 16:19:02,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 16:19:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:02,633 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:02,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash 732332587, now seen corresponding path program 1 times [2023-12-02 16:19:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:02,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782241651] [2023-12-02 16:19:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:02,634 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 16:19:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:02,635 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:02,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:02,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:19:02,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:19:02,728 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:19:02,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:02,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782241651] [2023-12-02 16:19:02,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782241651] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:19:02,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:19:02,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:19:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612249528] [2023-12-02 16:19:02,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:19:02,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:19:02,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:02,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:19:02,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:19:02,730 INFO L87 Difference]: Start difference. First operand 168 states and 257 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:19:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:02,806 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2023-12-02 16:19:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:19:02,806 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 16:19:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:02,807 INFO L225 Difference]: With dead ends: 111 [2023-12-02 16:19:02,807 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 16:19:02,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:19:02,808 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:02,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 292 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:19:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 16:19:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-12-02 16:19:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 95 states have internal predecessors, (123), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 16:19:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2023-12-02 16:19:02,812 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 24 [2023-12-02 16:19:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:02,812 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2023-12-02 16:19:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:19:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2023-12-02 16:19:02,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:19:02,813 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:02,813 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:02,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:19:03,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:03,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:03,014 INFO L85 PathProgramCache]: Analyzing trace with hash -280074892, now seen corresponding path program 1 times [2023-12-02 16:19:03,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:03,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1192689827] [2023-12-02 16:19:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:03,015 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 16:19:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:03,016 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:03,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:19:03,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:03,089 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 8 treesize of output 1 [2023-12-02 16:19:03,108 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 16:19:03,125 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:19:03,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:19:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:19:03,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:19:03,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:03,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1192689827] [2023-12-02 16:19:03,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1192689827] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:19:03,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:19:03,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:19:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711607352] [2023-12-02 16:19:03,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:19:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:19:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:03,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:19:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2023-12-02 16:19:03,146 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:19:03,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:03,333 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2023-12-02 16:19:03,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:19:03,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-12-02 16:19:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:03,334 INFO L225 Difference]: With dead ends: 141 [2023-12-02 16:19:03,334 INFO L226 Difference]: Without dead ends: 141 [2023-12-02 16:19:03,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2023-12-02 16:19:03,335 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 62 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:03,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 235 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2023-12-02 16:19:03,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-12-02 16:19:03,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 108. [2023-12-02 16:19:03,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 94 states have internal predecessors, (121), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 16:19:03,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2023-12-02 16:19:03,341 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 25 [2023-12-02 16:19:03,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:03,341 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2023-12-02 16:19:03,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 16:19:03,342 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2023-12-02 16:19:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:19:03,342 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:03,343 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:03,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,543 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -280074891, now seen corresponding path program 1 times [2023-12-02 16:19:03,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:03,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573959439] [2023-12-02 16:19:03,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:03,544 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 16:19:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:03,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:03,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 16:19:03,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:03,622 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 16:19:03,627 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 16:19:03,730 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:19:03,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:03,748 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 16:19:03,759 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:03,759 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 16:19:03,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:03,825 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 16:19:03,836 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:03,837 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 16:19:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2023-12-02 16:19:03,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:08,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573959439] [2023-12-02 16:19:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573959439] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:08,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1179008574] [2023-12-02 16:19:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:08,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:08,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:19:08,275 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:19:08,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 16:19:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:08,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 16:19:08,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:08,431 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 16:19:08,436 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 16:19:08,546 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:08,546 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 16:19:08,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 16:19:08,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:08,652 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 16:19:08,664 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:08,664 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 16:19:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-12-02 16:19:08,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:10,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1179008574] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:10,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43577901] [2023-12-02 16:19:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:10,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:10,945 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:10,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 16:19:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:11,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 16:19:11,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:11,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:11,191 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 16:19:11,204 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:11,205 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 16:19:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 16:19:11,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:11,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43577901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:11,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:19:11,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2023-12-02 16:19:11,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612826140] [2023-12-02 16:19:11,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:11,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 16:19:11,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:11,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 16:19:11,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=319, Unknown=2, NotChecked=36, Total=420 [2023-12-02 16:19:11,519 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:19:12,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:12,778 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2023-12-02 16:19:12,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 16:19:12,779 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 25 [2023-12-02 16:19:12,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:12,780 INFO L225 Difference]: With dead ends: 178 [2023-12-02 16:19:12,780 INFO L226 Difference]: Without dead ends: 178 [2023-12-02 16:19:12,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=121, Invalid=583, Unknown=2, NotChecked=50, Total=756 [2023-12-02 16:19:12,782 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 263 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:12,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 910 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 728 Invalid, 0 Unknown, 193 Unchecked, 1.0s Time] [2023-12-02 16:19:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-12-02 16:19:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 77. [2023-12-02 16:19:12,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 67 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:19:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-02 16:19:12,787 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 25 [2023-12-02 16:19:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:12,787 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-02 16:19:12,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-02 16:19:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-02 16:19:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:19:12,788 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:12,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:12,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:19:12,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 16:19:13,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 16:19:13,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:13,390 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:13,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash -280077995, now seen corresponding path program 1 times [2023-12-02 16:19:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:13,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890686968] [2023-12-02 16:19:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:13,390 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 16:19:13,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:13,391 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:13,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:19:13,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:13,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:19:13,465 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890686968] [2023-12-02 16:19:13,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890686968] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:19:13,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:19:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:19:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387935370] [2023-12-02 16:19:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:19:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:19:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:19:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:19:13,467 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:19:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:13,543 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2023-12-02 16:19:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:19:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-12-02 16:19:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:13,545 INFO L225 Difference]: With dead ends: 126 [2023-12-02 16:19:13,545 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 16:19:13,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:19:13,546 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 47 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:13,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 331 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:19:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 16:19:13,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2023-12-02 16:19:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.510204081632653) internal successors, (74), 68 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:19:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-12-02 16:19:13,549 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 25 [2023-12-02 16:19:13,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:13,550 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-12-02 16:19:13,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 16:19:13,550 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-12-02 16:19:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:19:13,550 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:13,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:13,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 607425686, now seen corresponding path program 1 times [2023-12-02 16:19:13,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:13,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026227135] [2023-12-02 16:19:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:13,752 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 16:19:13,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:13,752 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:13,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:19:13,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:19:14,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:14,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026227135] [2023-12-02 16:19:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026227135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151862202] [2023-12-02 16:19:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:19:14,267 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:19:14,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 16:19:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:14,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:19:14,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:19:14,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:14,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151862202] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:14,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508266652] [2023-12-02 16:19:14,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:14,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:14,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:14,441 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:14,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 16:19:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:14,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:19:14,517 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:19:14,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:14,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508266652] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:14,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:19:14,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 7, 6] total 15 [2023-12-02 16:19:14,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345883892] [2023-12-02 16:19:14,778 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:14,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:19:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:14,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:19:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:19:14,780 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:19:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:15,185 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-12-02 16:19:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:19:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 25 [2023-12-02 16:19:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:15,187 INFO L225 Difference]: With dead ends: 78 [2023-12-02 16:19:15,187 INFO L226 Difference]: Without dead ends: 78 [2023-12-02 16:19:15,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:19:15,188 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:15,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 188 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:19:15,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-02 16:19:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-12-02 16:19:15,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.469387755102041) internal successors, (72), 67 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:19:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-12-02 16:19:15,192 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 25 [2023-12-02 16:19:15,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:15,192 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-12-02 16:19:15,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:19:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-12-02 16:19:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:19:15,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:15,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:15,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-02 16:19:15,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 16:19:15,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:15,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:15,794 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:15,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:15,794 INFO L85 PathProgramCache]: Analyzing trace with hash -92383887, now seen corresponding path program 1 times [2023-12-02 16:19:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918989792] [2023-12-02 16:19:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:15,795 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 16:19:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:15,796 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:15,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (33)] Waiting until timeout for monitored process [2023-12-02 16:19:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:15,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 16:19:15,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:15,954 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 16:19:15,979 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 16:19:16,117 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-12-02 16:19:16,117 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 54 treesize of output 44 [2023-12-02 16:19:16,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:16,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2023-12-02 16:19:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:16,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:16,406 INFO L349 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2023-12-02 16:19:16,407 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 69 treesize of output 68 [2023-12-02 16:19:16,480 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918989792] [2023-12-02 16:19:16,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918989792] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:16,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [211713658] [2023-12-02 16:19:16,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:16,480 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:16,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:19:16,481 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:19:16,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 16:19:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:16,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 16:19:16,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:16,668 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 16:19:16,851 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:16,852 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 16:19:16,955 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 11 treesize of output 7 [2023-12-02 16:19:19,012 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_30|) (_ bv0 32))))) is different from true [2023-12-02 16:19:19,113 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 16:19:19,113 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 16:19:19,160 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 16:19:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 16:19:19,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:19,184 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2023-12-02 16:19:19,185 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 23 treesize of output 22 [2023-12-02 16:19:19,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [211713658] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:19,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150696751] [2023-12-02 16:19:19,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:19,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:19,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:19,263 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:19,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 16:19:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:19,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 16:19:19,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:19,349 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 16:19:19,435 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:19,436 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 16:19:19,518 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 11 treesize of output 7 [2023-12-02 16:19:21,580 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_14| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_32| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_32| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_32|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_14|)))) is different from true [2023-12-02 16:19:21,682 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 16:19:21,682 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 36 treesize of output 35 [2023-12-02 16:19:21,741 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 16:19:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 16:19:21,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:21,763 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2023-12-02 16:19:21,764 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 23 treesize of output 22 [2023-12-02 16:19:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:19:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150696751] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:19:22,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 16:19:22,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 11] total 31 [2023-12-02 16:19:22,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341520685] [2023-12-02 16:19:22,027 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:22,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 16:19:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 16:19:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1003, Unknown=10, NotChecked=130, Total=1260 [2023-12-02 16:19:22,028 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 32 states, 30 states have (on average 1.7) internal successors, (51), 25 states have internal predecessors, (51), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:19:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:30,188 INFO L93 Difference]: Finished difference Result 114 states and 127 transitions. [2023-12-02 16:19:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 16:19:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.7) internal successors, (51), 25 states have internal predecessors, (51), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 26 [2023-12-02 16:19:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:30,190 INFO L225 Difference]: With dead ends: 114 [2023-12-02 16:19:30,190 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 16:19:30,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=352, Invalid=2093, Unknown=13, NotChecked=194, Total=2652 [2023-12-02 16:19:30,192 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 450 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:30,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 559 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 803 Invalid, 0 Unknown, 242 Unchecked, 1.3s Time] [2023-12-02 16:19:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 16:19:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2023-12-02 16:19:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 72 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:19:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2023-12-02 16:19:30,197 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 26 [2023-12-02 16:19:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:30,198 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2023-12-02 16:19:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.7) internal successors, (51), 25 states have internal predecessors, (51), 7 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:19:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2023-12-02 16:19:30,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:19:30,199 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:30,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:19:30,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 16:19:30,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 16:19:30,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (33)] Ended with exit code 0 [2023-12-02 16:19:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:30,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:30,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash -92383886, now seen corresponding path program 1 times [2023-12-02 16:19:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:30,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236543] [2023-12-02 16:19:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:19:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:30,802 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:30,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:19:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:30,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 16:19:30,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:30,906 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 16:19:30,968 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:30,968 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 16:19:31,015 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 11 treesize of output 7 [2023-12-02 16:19:31,024 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 11 treesize of output 7 [2023-12-02 16:19:31,218 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 16:19:31,219 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 16:19:31,230 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 16:19:31,276 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 16:19:31,283 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 16:19:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:19:31,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:31,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:31,514 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 50 treesize of output 54 [2023-12-02 16:19:31,592 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_431 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_431) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_prenex_12 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_12) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (_ bv0 32)))) (forall ((v_prenex_12 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_12) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset|))) (forall ((v_ArrVal_430 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_430) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2023-12-02 16:19:31,651 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:19:31,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236543] [2023-12-02 16:19:31,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236543] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [461821713] [2023-12-02 16:19:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:31,652 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:19:31,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:19:31,653 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:19:31,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 16:19:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:31,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:19:31,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:31,835 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 16:19:32,000 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 16:19:34,107 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 16:19:34,107 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 16:19:34,285 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 11 treesize of output 7 [2023-12-02 16:19:34,306 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 11 treesize of output 7 [2023-12-02 16:19:34,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 16:19:34,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-12-02 16:19:34,502 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38| (_ BitVec 32))) (and (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38|)) (= (_ bv0 32) (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_38|) (_ bv0 32))))) (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|)))) is different from true [2023-12-02 16:19:34,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:19:34,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 16:19:34,578 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-12-02 16:19:34,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 16:19:34,767 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-12-02 16:19:34,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2023-12-02 16:19:34,800 INFO L349 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2023-12-02 16:19:34,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 29 [2023-12-02 16:19:34,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 16:19:34,925 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 16:19:34,932 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 16:19:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-12-02 16:19:34,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:35,033 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_457 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_458 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_457) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_458) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)))) (forall ((v_ArrVal_457 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_457) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32)))))) is different from false [2023-12-02 16:19:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [461821713] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598049973] [2023-12-02 16:19:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:35,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:35,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:19:35,657 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:19:35,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 16:19:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:35,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 16:19:35,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:35,745 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 16:19:35,784 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:19:35,784 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 16:19:35,805 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 11 treesize of output 7 [2023-12-02 16:19:35,813 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 11 treesize of output 7 [2023-12-02 16:19:35,963 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 16:19:35,963 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 16:19:35,967 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 16:19:35,980 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 16:19:35,987 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 16:19:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:19:35,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:36,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:19:36,040 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 50 treesize of output 54 [2023-12-02 16:19:36,105 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_16 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_16) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (bvadd (_ bv4 32) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset|))) (forall ((v_ArrVal_485 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_485) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (or (forall ((v_ArrVal_484 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_484) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (forall ((v_prenex_16 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_prenex_16) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) (_ bv0 32))))) is different from false [2023-12-02 16:19:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598049973] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:19:36,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:19:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 25 [2023-12-02 16:19:36,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938987189] [2023-12-02 16:19:36,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:19:36,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 16:19:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:19:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 16:19:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=669, Unknown=11, NotChecked=220, Total=992 [2023-12-02 16:19:36,176 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 16:19:38,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:41,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:43,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:45,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:47,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:49,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:51,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:19:51,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:19:51,974 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2023-12-02 16:19:51,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 16:19:51,974 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 26 [2023-12-02 16:19:51,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:19:51,975 INFO L225 Difference]: With dead ends: 130 [2023-12-02 16:19:51,975 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 16:19:51,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=189, Invalid=1148, Unknown=11, NotChecked=292, Total=1640 [2023-12-02 16:19:51,976 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 233 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 40 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:19:51,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 515 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 748 Invalid, 7 Unknown, 130 Unchecked, 15.2s Time] [2023-12-02 16:19:51,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 16:19:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 85. [2023-12-02 16:19:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:19:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2023-12-02 16:19:51,980 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 26 [2023-12-02 16:19:51,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:19:51,980 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2023-12-02 16:19:51,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 22 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 16:19:51,980 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2023-12-02 16:19:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 16:19:51,980 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:19:51,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 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 16:19:51,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:19:52,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2023-12-02 16:19:52,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-12-02 16:19:52,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:19:52,584 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:19:52,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:19:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 734262462, now seen corresponding path program 1 times [2023-12-02 16:19:52,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:19:52,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669386643] [2023-12-02 16:19:52,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:19:52,587 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 16:19:52,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:19:52,588 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:19:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (39)] Waiting until timeout for monitored process [2023-12-02 16:19:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:19:52,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:19:52,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:19:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:19:57,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:19:57,542 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-12-02 16:19:57,542 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 58 treesize of output 50 [2023-12-02 16:20:01,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:20:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669386643] [2023-12-02 16:20:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669386643] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623759874] [2023-12-02 16:20:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:20:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:20:01,807 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:20:01,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 16:20:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:01,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 16:20:01,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:11,313 WARN L876 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_DerPreprocessor_12 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~cfg~1#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~c11~0#1.base| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv1 1)))) (and (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~cfg~1#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv0 32))) (= (_ bv0 1) (bvadd (select (store .cse0 |ULTIMATE.start_entry_point_~cfg~1#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~c11~0#1.base|) (_ bv1 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base| (select (store .cse0 |ULTIMATE.start_entry_point_~cfg~1#1.base| v_DerPreprocessor_12) |ULTIMATE.start_entry_point_~c11~0#1.base|)) |ULTIMATE.start_entry_point_~cfg~1#1.base|)))))) is different from true [2023-12-02 16:20:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:11,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:15,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-12-02 16:20:21,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623759874] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:21,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761418157] [2023-12-02 16:20:21,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:21,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:20:21,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:20:21,746 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:20:21,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 16:20:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:21,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 16:20:21,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:21,985 INFO L349 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2023-12-02 16:20:21,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2023-12-02 16:20:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:20:32,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:32,372 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-12-02 16:20:32,373 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 58 treesize of output 50 [2023-12-02 16:20:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761418157] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:38,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:20:38,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 21 [2023-12-02 16:20:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356405710] [2023-12-02 16:20:38,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:20:38,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 16:20:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:20:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 16:20:38,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=674, Unknown=17, NotChecked=54, Total=870 [2023-12-02 16:20:38,657 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:20:40,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:42,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:44,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:46,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:48,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:20:54,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:20:54,241 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2023-12-02 16:20:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:20:54,242 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 31 [2023-12-02 16:20:54,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:20:54,243 INFO L225 Difference]: With dead ends: 123 [2023-12-02 16:20:54,243 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 16:20:54,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=187, Invalid=854, Unknown=19, NotChecked=62, Total=1122 [2023-12-02 16:20:54,244 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 75 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 17 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:20:54,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 495 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 531 Invalid, 5 Unknown, 126 Unchecked, 11.0s Time] [2023-12-02 16:20:54,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 16:20:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2023-12-02 16:20:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 48 states have (on average 1.4375) internal successors, (69), 66 states have internal predecessors, (69), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:20:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2023-12-02 16:20:54,248 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 31 [2023-12-02 16:20:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:20:54,248 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2023-12-02 16:20:54,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.526315789473684) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:20:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2023-12-02 16:20:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:20:54,249 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:20:54,249 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 16:20:54,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2023-12-02 16:20:54,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 16:20:54,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (39)] Ended with exit code 0 [2023-12-02 16:20:54,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:20:54,850 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:20:54,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:20:54,850 INFO L85 PathProgramCache]: Analyzing trace with hash 339478437, now seen corresponding path program 1 times [2023-12-02 16:20:54,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:20:54,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453407681] [2023-12-02 16:20:54,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:54,851 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 16:20:54,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:20:54,852 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:20:54,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:20:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:20:54,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 16:20:54,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:20:54,964 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 16:20:55,018 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:20:55,019 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 16:20:55,055 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 11 treesize of output 7 [2023-12-02 16:20:55,061 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 11 treesize of output 7 [2023-12-02 16:20:57,096 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_23| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_51| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_51| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_51|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_23|)))) is different from true [2023-12-02 16:20:57,102 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 16:20:59,371 INFO L349 Elim1Store]: treesize reduction 80, result has 25.2 percent of original size [2023-12-02 16:20:59,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2023-12-02 16:20:59,380 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 59 treesize of output 44 [2023-12-02 16:20:59,442 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 19 [2023-12-02 16:20:59,516 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 16:20:59,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2023-12-02 16:20:59,559 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 16:20:59,574 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:20:59,575 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:20:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2023-12-02 16:20:59,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:20:59,919 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_568 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |c_ULTIMATE.start_entry_point_~fe~1#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_568) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (_ bv1 1)))) is different from false [2023-12-02 16:20:59,941 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_568 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |c_ULTIMATE.start_entry_point_#t~ret49#1.base|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_568) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (_ bv1 1)))) is different from false [2023-12-02 16:20:59,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2023-12-02 16:20:59,966 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret49#1.base_61| (_ BitVec 32)) (v_ArrVal_568 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret49#1.base_61|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_568) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ULTIMATE.start_entry_point_#t~ret49#1.base_61|)) is different from false [2023-12-02 16:20:59,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:20:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453407681] [2023-12-02 16:20:59,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453407681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:20:59,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [854676205] [2023-12-02 16:20:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:20:59,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:20:59,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:20:59,969 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:20:59,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 16:21:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:00,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:21:00,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:00,175 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 16:21:02,351 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:02,351 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 16:21:02,454 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 11 treesize of output 7 [2023-12-02 16:21:02,459 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 11 treesize of output 7 [2023-12-02 16:21:02,626 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 16:21:03,052 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-12-02 16:21:03,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 60 [2023-12-02 16:21:03,080 INFO L349 Elim1Store]: treesize reduction 29, result has 31.0 percent of original size [2023-12-02 16:21:03,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 29 [2023-12-02 16:21:03,199 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 16:21:03,285 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:21:03,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2023-12-02 16:21:05,424 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:21:05,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:21:05,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:21:05,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:08,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2023-12-02 16:21:08,174 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_599 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret49#1.base_64| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret49#1.base_64|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_599) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ULTIMATE.start_entry_point_#t~ret49#1.base_64|)) is different from false [2023-12-02 16:21:08,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [854676205] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:08,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390730081] [2023-12-02 16:21:08,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:08,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:08,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:08,177 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:08,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 16:21:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:08,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 16:21:08,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:08,272 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 16:21:08,297 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:08,298 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 16:21:08,309 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 11 treesize of output 7 [2023-12-02 16:21:08,315 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 11 treesize of output 7 [2023-12-02 16:21:10,325 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_55| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_55|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_26|) |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_55|))) is different from true [2023-12-02 16:21:10,330 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 16:21:12,485 INFO L349 Elim1Store]: treesize reduction 80, result has 25.2 percent of original size [2023-12-02 16:21:12,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 80 [2023-12-02 16:21:12,491 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 59 treesize of output 44 [2023-12-02 16:21:12,510 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 19 [2023-12-02 16:21:12,526 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-12-02 16:21:12,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 18 [2023-12-02 16:21:12,557 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:21:12,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:21:12,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-12-02 16:21:12,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:13,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 76 [2023-12-02 16:21:13,019 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_599 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_entry_point_#t~ret49#1.base_67| (_ BitVec 32))) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~cfg~1#1.base|) |c_ULTIMATE.start_entry_point_~cfg~1#1.offset| |v_ULTIMATE.start_entry_point_#t~ret49#1.base_67|)))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~cfg~1#1.base| v_ArrVal_599) |c_ULTIMATE.start_entry_point_~c11~0#1.base|) |c_ULTIMATE.start_entry_point_~c11~0#1.offset|)) |v_ULTIMATE.start_entry_point_#t~ret49#1.base_67|)) is different from false [2023-12-02 16:21:13,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390730081] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:13,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:13,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-12-02 16:21:13,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586208766] [2023-12-02 16:21:13,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:13,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 16:21:13,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:21:13,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 16:21:13,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1064, Unknown=31, NotChecked=584, Total=1806 [2023-12-02 16:21:13,023 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 27 states have internal predecessors, (46), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:21:15,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:17,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:19,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:27,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:29,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:31,173 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:37,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:39,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:40,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:21:40,140 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2023-12-02 16:21:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 16:21:40,141 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 27 states have internal predecessors, (46), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 34 [2023-12-02 16:21:40,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:21:40,142 INFO L225 Difference]: With dead ends: 112 [2023-12-02 16:21:40,143 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 16:21:40,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=288, Invalid=2060, Unknown=36, NotChecked=808, Total=3192 [2023-12-02 16:21:40,144 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 163 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 43 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 18.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:21:40,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 643 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1079 Invalid, 8 Unknown, 349 Unchecked, 18.2s Time] [2023-12-02 16:21:40,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 16:21:40,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 86. [2023-12-02 16:21:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 73 states have internal predecessors, (79), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:21:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-12-02 16:21:40,147 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 34 [2023-12-02 16:21:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:21:40,148 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-12-02 16:21:40,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 27 states have internal predecessors, (46), 6 states have call successors, (7), 5 states have call predecessors, (7), 8 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-02 16:21:40,148 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-12-02 16:21:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:21:40,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:21:40,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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 16:21:40,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 16:21:40,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2023-12-02 16:21:40,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Forceful destruction successful, exit code 0 [2023-12-02 16:21:40,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:21:40,749 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:21:40,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:21:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash 339478438, now seen corresponding path program 1 times [2023-12-02 16:21:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:21:40,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [920594104] [2023-12-02 16:21:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:40,750 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 16:21:40,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:21:40,751 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:21:40,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:21:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:40,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 16:21:40,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:40,866 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 16:21:40,914 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:40,914 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 16:21:40,947 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 11 treesize of output 7 [2023-12-02 16:21:40,956 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 11 treesize of output 7 [2023-12-02 16:21:42,997 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_27| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_57| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_57| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_57|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_27|)))) is different from true [2023-12-02 16:21:43,036 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 16:21:43,041 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 16:21:43,388 INFO L349 Elim1Store]: treesize reduction 80, result has 25.2 percent of original size [2023-12-02 16:21:43,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 100 [2023-12-02 16:21:43,395 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-12-02 16:21:43,571 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-12-02 16:21:43,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2023-12-02 16:21:43,668 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:21:43,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:21:43,685 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 16:21:43,694 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:43,695 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 16:21:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-12-02 16:21:43,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:44,123 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:21:44,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [920594104] [2023-12-02 16:21:44,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [920594104] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:44,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [194345817] [2023-12-02 16:21:44,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:44,124 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:21:44,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:21:44,124 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:21:44,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 16:21:44,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:44,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 16:21:44,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:44,322 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 16:21:44,526 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:44,527 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 16:21:44,654 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 11 treesize of output 7 [2023-12-02 16:21:44,665 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 11 treesize of output 7 [2023-12-02 16:21:44,944 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 16:21:44,948 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 16:21:45,544 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-12-02 16:21:45,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 72 [2023-12-02 16:21:45,579 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2023-12-02 16:21:45,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 32 [2023-12-02 16:21:45,837 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 16:21:45,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 30 [2023-12-02 16:21:45,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:21:45,879 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 16:21:45,890 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:45,890 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 16:21:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-12-02 16:21:45,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:46,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [194345817] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:46,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361115982] [2023-12-02 16:21:46,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:21:46,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:21:46,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:21:46,591 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:21:46,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 16:21:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:21:46,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 16:21:46,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:21:46,717 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 16:21:46,740 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:46,740 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 16:21:46,748 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 11 treesize of output 7 [2023-12-02 16:21:46,754 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 11 treesize of output 7 [2023-12-02 16:21:48,766 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_61| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_30| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_61| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~c11~0#1.base_BEFORE_CALL_61|) |v_ULTIMATE.start_entry_point_~c11~0#1.offset_BEFORE_CALL_30|)))) is different from true [2023-12-02 16:21:48,794 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 16:21:48,798 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 16:21:48,970 INFO L349 Elim1Store]: treesize reduction 80, result has 25.2 percent of original size [2023-12-02 16:21:48,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 100 [2023-12-02 16:21:48,977 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-12-02 16:21:49,052 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-12-02 16:21:49,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 34 [2023-12-02 16:21:49,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:21:49,098 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 16:21:49,106 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:21:49,106 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 16:21:49,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-12-02 16:21:49,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:21:49,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361115982] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:21:49,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:21:49,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2023-12-02 16:21:49,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999309442] [2023-12-02 16:21:49,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:21:49,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 16:21:49,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:21:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 16:21:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1082, Unknown=3, NotChecked=204, Total=1406 [2023-12-02 16:21:49,809 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 36 states, 32 states have (on average 1.375) internal successors, (44), 27 states have internal predecessors, (44), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:21:51,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:53,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:21:57,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:00,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:04,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:06,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:09,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:11,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:13,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:15,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:17,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 16:22:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:17,952 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2023-12-02 16:22:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 16:22:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 1.375) internal successors, (44), 27 states have internal predecessors, (44), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 34 [2023-12-02 16:22:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:17,954 INFO L225 Difference]: With dead ends: 138 [2023-12-02 16:22:17,954 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 16:22:17,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=236, Invalid=1934, Unknown=4, NotChecked=276, Total=2450 [2023-12-02 16:22:17,956 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 167 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 39 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 1993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:17,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1222 Invalid, 1993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1496 Invalid, 11 Unknown, 447 Unchecked, 25.1s Time] [2023-12-02 16:22:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 16:22:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 86. [2023-12-02 16:22:17,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 73 states have internal predecessors, (78), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 16:22:17,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2023-12-02 16:22:17,960 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 34 [2023-12-02 16:22:17,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:17,961 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2023-12-02 16:22:17,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 1.375) internal successors, (44), 27 states have internal predecessors, (44), 6 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:17,961 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2023-12-02 16:22:17,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:22:17,961 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:17,961 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:17,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:18,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2023-12-02 16:22:18,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 16:22:18,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:18,562 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:18,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:18,563 INFO L85 PathProgramCache]: Analyzing trace with hash -171055740, now seen corresponding path program 1 times [2023-12-02 16:22:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620948000] [2023-12-02 16:22:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:18,563 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 16:22:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:18,564 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:18,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (48)] Waiting until timeout for monitored process [2023-12-02 16:22:18,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:18,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:18,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:18,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:18,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620948000] [2023-12-02 16:22:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [620948000] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:18,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:18,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:18,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222006141] [2023-12-02 16:22:18,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:18,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:22:18,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:18,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:22:18,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:18,686 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:18,754 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2023-12-02 16:22:18,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:22:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-12-02 16:22:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:18,756 INFO L225 Difference]: With dead ends: 77 [2023-12-02 16:22:18,756 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 16:22:18,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:18,756 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:18,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 257 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:22:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 16:22:18,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-12-02 16:22:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 62 states have internal predecessors, (66), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 16:22:18,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2023-12-02 16:22:18,760 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 34 [2023-12-02 16:22:18,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:18,760 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2023-12-02 16:22:18,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:18,760 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2023-12-02 16:22:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:22:18,761 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:18,761 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:18,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (48)] Ended with exit code 0 [2023-12-02 16:22:18,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:18,961 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:18,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:18,962 INFO L85 PathProgramCache]: Analyzing trace with hash -178716520, now seen corresponding path program 1 times [2023-12-02 16:22:18,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:18,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997925457] [2023-12-02 16:22:18,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:18,962 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 16:22:18,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:18,963 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:18,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:22:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:19,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:19,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:19,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:19,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:19,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997925457] [2023-12-02 16:22:19,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997925457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:19,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:19,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:19,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174976905] [2023-12-02 16:22:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:19,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:22:19,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:19,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:22:19,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:19,073 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:22:19,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:19,157 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2023-12-02 16:22:19,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:22:19,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-02 16:22:19,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:19,158 INFO L225 Difference]: With dead ends: 85 [2023-12-02 16:22:19,158 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 16:22:19,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:19,159 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 8 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:19,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 227 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:22:19,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 16:22:19,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-12-02 16:22:19,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.38) internal successors, (69), 65 states have internal predecessors, (69), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:19,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2023-12-02 16:22:19,162 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 36 [2023-12-02 16:22:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:19,162 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2023-12-02 16:22:19,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 16:22:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2023-12-02 16:22:19,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:22:19,163 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:19,163 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:19,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:19,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,363 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:19,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:19,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1564093815, now seen corresponding path program 1 times [2023-12-02 16:22:19,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:19,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354122991] [2023-12-02 16:22:19,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:19,364 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 16:22:19,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:19,365 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:19,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:22:19,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:19,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:19,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354122991] [2023-12-02 16:22:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354122991] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:19,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:19,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395580242] [2023-12-02 16:22:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:22:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:22:19,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:22:19,495 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:19,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:19,725 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2023-12-02 16:22:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:22:19,726 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-02 16:22:19,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:19,726 INFO L225 Difference]: With dead ends: 90 [2023-12-02 16:22:19,727 INFO L226 Difference]: Without dead ends: 90 [2023-12-02 16:22:19,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:22:19,727 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 16 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:19,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 254 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:22:19,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-12-02 16:22:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2023-12-02 16:22:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 69 states have internal predecessors, (73), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2023-12-02 16:22:19,730 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 36 [2023-12-02 16:22:19,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:19,731 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2023-12-02 16:22:19,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:19,731 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2023-12-02 16:22:19,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 16:22:19,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:19,731 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:19,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,932 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:19,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1564093816, now seen corresponding path program 1 times [2023-12-02 16:22:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [102827476] [2023-12-02 16:22:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:19,933 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 16:22:19,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:19,933 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:19,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:22:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:20,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 16:22:20,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:20,081 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 16:22:20,089 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 16:22:20,198 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:22:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:20,216 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 16:22:20,226 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:20,227 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 16:22:20,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:20,300 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 16:22:20,318 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:20,318 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 16:22:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 8 not checked. [2023-12-02 16:22:20,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:21,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [102827476] [2023-12-02 16:22:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [102827476] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1685125413] [2023-12-02 16:22:21,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:21,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:21,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:21,233 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:21,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2023-12-02 16:22:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:21,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:22:21,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:21,482 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 16:22:21,487 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 16:22:21,608 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 16:22:21,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 16:22:21,625 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:21,626 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 16:22:21,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:21,720 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 16:22:21,730 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:21,731 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 16:22:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2023-12-02 16:22:21,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1685125413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703695027] [2023-12-02 16:22:22,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:22,573 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:22,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 16:22:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:22,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 16:22:22,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:22,690 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 16:22:22,696 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 16:22:22,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:22,772 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 16:22:22,784 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:22,784 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 16:22:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:22,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 16:22:22,843 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:22,843 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 16:22:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 8 not checked. [2023-12-02 16:22:22,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:24,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703695027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:24,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:22:24,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 14 [2023-12-02 16:22:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135309964] [2023-12-02 16:22:24,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:22:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:22:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2023-12-02 16:22:24,774 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:25,591 INFO L93 Difference]: Finished difference Result 115 states and 121 transitions. [2023-12-02 16:22:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:22:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2023-12-02 16:22:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:25,593 INFO L225 Difference]: With dead ends: 115 [2023-12-02 16:22:25,593 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 16:22:25,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=85, Invalid=518, Unknown=1, NotChecked=46, Total=650 [2023-12-02 16:22:25,594 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 66 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:25,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 705 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 436 Invalid, 0 Unknown, 112 Unchecked, 0.6s Time] [2023-12-02 16:22:25,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 16:22:25,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2023-12-02 16:22:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 69 states have internal predecessors, (72), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-12-02 16:22:25,597 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 36 [2023-12-02 16:22:25,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:25,597 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-12-02 16:22:25,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:25,597 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-12-02 16:22:25,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:22:25,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:25,598 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:25,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:25,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2023-12-02 16:22:26,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 16:22:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:26,199 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:26,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1245766592, now seen corresponding path program 1 times [2023-12-02 16:22:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:26,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713939080] [2023-12-02 16:22:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:26,200 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 16:22:26,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:26,200 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:26,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:22:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:26,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:22:26,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:26,337 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 8 treesize of output 1 [2023-12-02 16:22:26,354 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 16:22:26,370 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:22:26,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 16:22:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:26,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:26,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:26,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713939080] [2023-12-02 16:22:26,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713939080] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:26,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:26,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:22:26,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793085750] [2023-12-02 16:22:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:26,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:22:26,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:26,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:22:26,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=22, Unknown=1, NotChecked=8, Total=42 [2023-12-02 16:22:26,404 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:26,572 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-12-02 16:22:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:22:26,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2023-12-02 16:22:26,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:26,573 INFO L225 Difference]: With dead ends: 82 [2023-12-02 16:22:26,574 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 16:22:26,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=38, Unknown=1, NotChecked=12, Total=72 [2023-12-02 16:22:26,574 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 16 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:26,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 197 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 113 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2023-12-02 16:22:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 16:22:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-12-02 16:22:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.3396226415094339) internal successors, (71), 68 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2023-12-02 16:22:26,578 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 37 [2023-12-02 16:22:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:26,578 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2023-12-02 16:22:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 16:22:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2023-12-02 16:22:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 16:22:26,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:26,579 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:26,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:26,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:26,780 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:26,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1245766591, now seen corresponding path program 1 times [2023-12-02 16:22:26,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325066621] [2023-12-02 16:22:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:26,780 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 16:22:26,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:26,781 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:26,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (55)] Waiting until timeout for monitored process [2023-12-02 16:22:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:26,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjunts are in the unsatisfiable core [2023-12-02 16:22:26,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:26,955 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 16:22:26,963 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 16:22:27,081 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 16:22:27,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:27,104 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 16:22:27,116 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:27,116 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 16:22:27,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:27,181 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 16:22:27,191 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:27,192 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 16:22:27,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:27,280 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 16:22:27,288 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:27,289 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 16:22:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 6 not checked. [2023-12-02 16:22:27,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:27,772 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:27,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325066621] [2023-12-02 16:22:27,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325066621] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:27,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622145552] [2023-12-02 16:22:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:27,772 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:27,773 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:27,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2023-12-02 16:22:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:28,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 16:22:28,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:28,053 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 16:22:28,060 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 16:22:28,176 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,176 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 16:22:28,184 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 16:22:28,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:28,269 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 16:22:28,278 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,278 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 16:22:28,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:28,331 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 16:22:28,339 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,340 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 16:22:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2023-12-02 16:22:28,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:28,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622145552] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:28,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179242072] [2023-12-02 16:22:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:28,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:28,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:28,583 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 16:22:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:28,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-02 16:22:28,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:28,718 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 16:22:28,722 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 16:22:28,796 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 16:22:28,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 16:22:28,809 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,809 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 16:22:28,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:28,852 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 16:22:28,861 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,861 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 16:22:28,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:28,916 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 16:22:28,927 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 16:22:28,928 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 16:22:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 8 not checked. [2023-12-02 16:22:28,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:29,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179242072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:29,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:22:29,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 14 [2023-12-02 16:22:29,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594920167] [2023-12-02 16:22:29,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:29,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:22:29,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:22:29,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=266, Unknown=1, NotChecked=32, Total=342 [2023-12-02 16:22:29,232 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:30,205 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2023-12-02 16:22:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 16:22:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-12-02 16:22:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:30,207 INFO L225 Difference]: With dead ends: 114 [2023-12-02 16:22:30,207 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 16:22:30,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=78, Invalid=477, Unknown=1, NotChecked=44, Total=600 [2023-12-02 16:22:30,208 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 70 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:30,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 720 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 500 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2023-12-02 16:22:30,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 16:22:30,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 80. [2023-12-02 16:22:30,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.320754716981132) internal successors, (70), 67 states have internal predecessors, (70), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:30,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2023-12-02 16:22:30,212 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 37 [2023-12-02 16:22:30,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:30,212 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2023-12-02 16:22:30,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 12 states have internal predecessors, (25), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2023-12-02 16:22:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:22:30,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:30,213 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:30,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:30,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (55)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:30,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-12-02 16:22:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:30,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1114209775, now seen corresponding path program 1 times [2023-12-02 16:22:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:30,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279913331] [2023-12-02 16:22:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:30,815 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 16:22:30,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:30,816 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:30,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Waiting until timeout for monitored process [2023-12-02 16:22:30,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:30,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:30,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:30,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:30,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:30,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279913331] [2023-12-02 16:22:30,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279913331] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:30,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:30,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:22:30,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145744615] [2023-12-02 16:22:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:30,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:22:30,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:22:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:30,956 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:31,025 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-12-02 16:22:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:22:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2023-12-02 16:22:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:31,026 INFO L225 Difference]: With dead ends: 79 [2023-12-02 16:22:31,026 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 16:22:31,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:31,026 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 7 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:31,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 215 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:22:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 16:22:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-02 16:22:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 66 states have internal predecessors, (69), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-12-02 16:22:31,029 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 39 [2023-12-02 16:22:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:31,030 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-12-02 16:22:31,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-12-02 16:22:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:22:31,030 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:31,031 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:31,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:31,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:31,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:31,231 INFO L85 PathProgramCache]: Analyzing trace with hash 180764746, now seen corresponding path program 1 times [2023-12-02 16:22:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433577490] [2023-12-02 16:22:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:31,232 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 16:22:31,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:31,233 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:31,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:31,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:31,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:31,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:31,737 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433577490] [2023-12-02 16:22:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433577490] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:31,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:31,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:31,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458846120] [2023-12-02 16:22:31,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:31,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:22:31,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:31,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:22:31,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:22:31,739 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:32,206 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2023-12-02 16:22:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:22:32,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2023-12-02 16:22:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:32,208 INFO L225 Difference]: With dead ends: 80 [2023-12-02 16:22:32,208 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 16:22:32,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:22:32,209 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 75 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:32,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 148 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:22:32,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 16:22:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2023-12-02 16:22:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 65 states have internal predecessors, (68), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-12-02 16:22:32,212 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 40 [2023-12-02 16:22:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:32,213 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-12-02 16:22:32,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-12-02 16:22:32,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:22:32,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:32,214 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:32,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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)] Ended with exit code 0 [2023-12-02 16:22:32,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:32,414 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:32,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:32,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1298896146, now seen corresponding path program 1 times [2023-12-02 16:22:32,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:32,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069443877] [2023-12-02 16:22:32,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:32,415 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 16:22:32,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:32,416 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:32,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (60)] Waiting until timeout for monitored process [2023-12-02 16:22:32,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:32,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:22:32,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:32,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:32,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:32,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069443877] [2023-12-02 16:22:32,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069443877] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:32,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:32,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 16:22:32,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549859915] [2023-12-02 16:22:32,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:32,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:22:32,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:22:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:22:32,587 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:32,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:32,875 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2023-12-02 16:22:32,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:22:32,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-12-02 16:22:32,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:32,876 INFO L225 Difference]: With dead ends: 106 [2023-12-02 16:22:32,876 INFO L226 Difference]: Without dead ends: 106 [2023-12-02 16:22:32,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-02 16:22:32,877 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:32,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 233 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:22:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-02 16:22:32,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2023-12-02 16:22:32,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.290909090909091) internal successors, (71), 67 states have internal predecessors, (71), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:32,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2023-12-02 16:22:32,880 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 40 [2023-12-02 16:22:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:32,880 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2023-12-02 16:22:32,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2023-12-02 16:22:32,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 16:22:32,881 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:32,881 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:32,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (60)] Ended with exit code 0 [2023-12-02 16:22:33,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:33,081 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:33,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:33,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1298896145, now seen corresponding path program 1 times [2023-12-02 16:22:33,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:33,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [113046408] [2023-12-02 16:22:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:33,083 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 16:22:33,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:33,084 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:33,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (61)] Waiting until timeout for monitored process [2023-12-02 16:22:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:33,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 16:22:33,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:33,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:33,838 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:22:33,838 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 24 treesize of output 28 [2023-12-02 16:22:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:34,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [113046408] [2023-12-02 16:22:34,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [113046408] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:34,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [360410900] [2023-12-02 16:22:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:34,229 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:34,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:34,230 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:34,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2023-12-02 16:22:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:34,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 16:22:34,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:34,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:34,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:34,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:22:34,759 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 24 treesize of output 28 [2023-12-02 16:22:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:34,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [360410900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:34,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500934918] [2023-12-02 16:22:34,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:34,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:34,910 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:34,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-02 16:22:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:35,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 16:22:35,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:35,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:35,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 16:22:35,328 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 24 treesize of output 28 [2023-12-02 16:22:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:35,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500934918] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:35,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:22:35,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2023-12-02 16:22:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409275067] [2023-12-02 16:22:35,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:35,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 16:22:35,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 16:22:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:22:35,560 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 16:22:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:36,231 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2023-12-02 16:22:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:22:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 40 [2023-12-02 16:22:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:36,233 INFO L225 Difference]: With dead ends: 79 [2023-12-02 16:22:36,233 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 16:22:36,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-12-02 16:22:36,234 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:36,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 405 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:22:36,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 16:22:36,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-02 16:22:36,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 66 states have internal predecessors, (69), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:36,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-12-02 16:22:36,237 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 40 [2023-12-02 16:22:36,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:36,238 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-12-02 16:22:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-02 16:22:36,238 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-12-02 16:22:36,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:22:36,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:36,238 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:36,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:36,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2023-12-02 16:22:36,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (61)] Ended with exit code 0 [2023-12-02 16:22:36,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:36,839 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:36,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:36,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1308739921, now seen corresponding path program 1 times [2023-12-02 16:22:36,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:36,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994386323] [2023-12-02 16:22:36,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:36,840 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 16:22:36,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:36,841 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:36,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (64)] Waiting until timeout for monitored process [2023-12-02 16:22:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:36,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:22:36,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:36,995 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 16:22:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:37,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:37,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:37,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994386323] [2023-12-02 16:22:37,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994386323] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:37,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087714794] [2023-12-02 16:22:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:37,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:22:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:22:37,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:22:37,046 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:37,261 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2023-12-02 16:22:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:22:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-12-02 16:22:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:37,262 INFO L225 Difference]: With dead ends: 89 [2023-12-02 16:22:37,262 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 16:22:37,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:22:37,263 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 44 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:37,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 140 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:22:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 16:22:37,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2023-12-02 16:22:37,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 68 states have internal predecessors, (72), 7 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 16:22:37,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2023-12-02 16:22:37,266 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 41 [2023-12-02 16:22:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:37,266 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2023-12-02 16:22:37,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:37,266 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2023-12-02 16:22:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:22:37,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:37,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:37,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (64)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:37,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:37,467 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:37,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:37,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1015336914, now seen corresponding path program 1 times [2023-12-02 16:22:37,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:37,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [467423692] [2023-12-02 16:22:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:37,468 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 16:22:37,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:37,469 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:37,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (65)] Waiting until timeout for monitored process [2023-12-02 16:22:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:37,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:37,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:37,628 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:37,628 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:37,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [467423692] [2023-12-02 16:22:37,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [467423692] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:37,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:37,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 16:22:37,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268359447] [2023-12-02 16:22:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:22:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:37,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:22:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:37,630 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:37,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:37,719 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2023-12-02 16:22:37,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:22:37,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2023-12-02 16:22:37,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:37,720 INFO L225 Difference]: With dead ends: 76 [2023-12-02 16:22:37,720 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 16:22:37,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:37,721 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:37,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 227 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:22:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 16:22:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 16:22:37,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-12-02 16:22:37,724 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 41 [2023-12-02 16:22:37,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:37,725 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-12-02 16:22:37,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-12-02 16:22:37,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:22:37,725 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:37,726 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:37,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (65)] Ended with exit code 0 [2023-12-02 16:22:37,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:37,926 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:37,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:37,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1596358487, now seen corresponding path program 1 times [2023-12-02 16:22:37,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:37,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326395396] [2023-12-02 16:22:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:37,927 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 16:22:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:37,928 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:37,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (66)] Waiting until timeout for monitored process [2023-12-02 16:22:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:38,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 16:22:38,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:38,186 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 16:22:38,193 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 16:22:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:38,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:38,705 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 21 [2023-12-02 16:22:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:38,814 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 30 treesize of output 24 [2023-12-02 16:22:38,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:38,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 16:22:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 16:22:38,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326395396] [2023-12-02 16:22:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326395396] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:38,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:22:38,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2023-12-02 16:22:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236870866] [2023-12-02 16:22:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:38,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:22:38,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:38,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:22:38,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:22:38,934 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:39,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:39,281 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2023-12-02 16:22:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:22:39,281 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-12-02 16:22:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:39,282 INFO L225 Difference]: With dead ends: 94 [2023-12-02 16:22:39,282 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 16:22:39,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:22:39,282 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 24 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:39,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 414 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:22:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 16:22:39,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2023-12-02 16:22:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-12-02 16:22:39,285 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 42 [2023-12-02 16:22:39,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:39,285 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-12-02 16:22:39,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:39,285 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-12-02 16:22:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:22:39,285 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:39,285 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:39,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (66)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:39,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:39,486 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:39,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash -726350572, now seen corresponding path program 1 times [2023-12-02 16:22:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:39,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170839048] [2023-12-02 16:22:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:39,486 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 16:22:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:39,487 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:39,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (67)] Waiting until timeout for monitored process [2023-12-02 16:22:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:39,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 16:22:39,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:39,720 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 16:22:39,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 16:22:39,918 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-12-02 16:22:39,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 29 [2023-12-02 16:22:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:39,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:22:39,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170839048] [2023-12-02 16:22:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170839048] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:22:39,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:22:39,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 16:22:39,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648705474] [2023-12-02 16:22:39,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:39,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 16:22:39,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:39,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 16:22:39,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:22:39,962 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:40,550 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2023-12-02 16:22:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:22:40,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 43 [2023-12-02 16:22:40,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:40,552 INFO L225 Difference]: With dead ends: 83 [2023-12-02 16:22:40,552 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 16:22:40,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:22:40,552 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 292 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:22:40,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 16:22:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 76. [2023-12-02 16:22:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.2) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-12-02 16:22:40,554 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 43 [2023-12-02 16:22:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:40,554 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-12-02 16:22:40,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-12-02 16:22:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:22:40,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:40,555 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:40,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (67)] Ended with exit code 0 [2023-12-02 16:22:40,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:40,756 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:40,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -2052486400, now seen corresponding path program 1 times [2023-12-02 16:22:40,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:40,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126602299] [2023-12-02 16:22:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:40,757 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 16:22:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:40,757 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:40,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (68)] Waiting until timeout for monitored process [2023-12-02 16:22:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:40,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:40,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:40,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:40,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:40,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126602299] [2023-12-02 16:22:40,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126602299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:40,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1793006628] [2023-12-02 16:22:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:40,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:40,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:40,970 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:40,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2023-12-02 16:22:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:41,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:41,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:41,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:41,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1793006628] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:41,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277401967] [2023-12-02 16:22:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:41,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:41,280 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:41,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-12-02 16:22:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:41,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:41,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:41,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:41,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277401967] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:41,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:22:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2023-12-02 16:22:41,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019043350] [2023-12-02 16:22:41,469 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:41,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:22:41,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:41,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:22:41,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:41,470 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:41,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:41,514 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2023-12-02 16:22:41,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:22:41,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2023-12-02 16:22:41,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:41,515 INFO L225 Difference]: With dead ends: 75 [2023-12-02 16:22:41,515 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 16:22:41,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:22:41,515 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:41,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 177 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:22:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 16:22:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 16:22:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 62 states have internal predecessors, (65), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2023-12-02 16:22:41,518 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 43 [2023-12-02 16:22:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:41,518 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2023-12-02 16:22:41,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 16:22:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2023-12-02 16:22:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 16:22:41,518 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:41,518 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:41,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (68)] Ended with exit code 0 [2023-12-02 16:22:41,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-12-02 16:22:41,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2023-12-02 16:22:42,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:42,119 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:42,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 797431161, now seen corresponding path program 1 times [2023-12-02 16:22:42,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:42,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47263455] [2023-12-02 16:22:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:42,120 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 16:22:42,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:42,121 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:42,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (71)] Waiting until timeout for monitored process [2023-12-02 16:22:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:42,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:42,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:42,774 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:22:42,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:42,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:42,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47263455] [2023-12-02 16:22:42,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47263455] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:42,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [198929553] [2023-12-02 16:22:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:42,887 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:42,888 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:42,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2023-12-02 16:22:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:43,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:43,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:43,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:43,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [198929553] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:43,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213951989] [2023-12-02 16:22:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:43,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:43,161 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:43,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-12-02 16:22:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:43,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:22:43,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:43,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:43,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213951989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:43,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:22:43,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 16:22:43,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434756392] [2023-12-02 16:22:43,395 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:43,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:22:43,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:43,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:22:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:22:43,397 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:22:43,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:43,584 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2023-12-02 16:22:43,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:22:43,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 44 [2023-12-02 16:22:43,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:43,586 INFO L225 Difference]: With dead ends: 76 [2023-12-02 16:22:43,586 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 16:22:43,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 244 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:22:43,586 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:43,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 120 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:22:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 16:22:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2023-12-02 16:22:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 61 states have internal predecessors, (64), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:43,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-12-02 16:22:43,589 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 44 [2023-12-02 16:22:43,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:43,589 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-12-02 16:22:43,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 5 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-02 16:22:43,589 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-12-02 16:22:43,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:22:43,590 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:43,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:43,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (71)] Ended with exit code 0 [2023-12-02 16:22:43,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2023-12-02 16:22:43,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-12-02 16:22:44,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:44,191 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:44,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:44,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2056841213, now seen corresponding path program 1 times [2023-12-02 16:22:44,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:44,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71127397] [2023-12-02 16:22:44,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:44,192 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 16:22:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:44,193 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:44,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (74)] Waiting until timeout for monitored process [2023-12-02 16:22:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:44,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 16:22:44,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:44,483 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 16:22:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 16:22:44,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:44,765 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 30 treesize of output 24 [2023-12-02 16:22:44,838 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 30 treesize of output 24 [2023-12-02 16:22:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 16:22:45,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71127397] [2023-12-02 16:22:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71127397] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:45,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:22:45,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [12] total 19 [2023-12-02 16:22:45,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849179861] [2023-12-02 16:22:45,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:45,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:22:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:45,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:22:45,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:22:45,002 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:45,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:45,404 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2023-12-02 16:22:45,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 16:22:45,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2023-12-02 16:22:45,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:45,405 INFO L225 Difference]: With dead ends: 73 [2023-12-02 16:22:45,405 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 16:22:45,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2023-12-02 16:22:45,406 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 34 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:45,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 342 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:22:45,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 16:22:45,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-12-02 16:22:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 60 states have internal predecessors, (63), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2023-12-02 16:22:45,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 45 [2023-12-02 16:22:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:45,408 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2023-12-02 16:22:45,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.111111111111111) internal successors, (28), 10 states have internal predecessors, (28), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2023-12-02 16:22:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 16:22:45,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:45,409 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:22:45,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (74)] Ended with exit code 0 [2023-12-02 16:22:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:45,610 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:45,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1049437662, now seen corresponding path program 1 times [2023-12-02 16:22:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033772758] [2023-12-02 16:22:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:45,610 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 16:22:45,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:45,611 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:45,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (75)] Waiting until timeout for monitored process [2023-12-02 16:22:45,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:45,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:45,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:45,750 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 16:22:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:45,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:45,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033772758] [2023-12-02 16:22:45,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033772758] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:45,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1320064066] [2023-12-02 16:22:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:45,901 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:22:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:22:45,902 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:22:45,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2023-12-02 16:22:46,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:46,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:22:46,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:46,189 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 16:22:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:46,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:46,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1320064066] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:46,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802917834] [2023-12-02 16:22:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:46,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:22:46,362 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:22:46,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-12-02 16:22:46,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:46,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:22:46,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:46,499 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 16:22:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:46,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:46,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802917834] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:22:46,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:22:46,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 7 [2023-12-02 16:22:46,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250656685] [2023-12-02 16:22:46,652 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:22:46,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:22:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:22:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:22:46,653 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:22:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:46,972 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2023-12-02 16:22:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:22:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2023-12-02 16:22:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:46,973 INFO L225 Difference]: With dead ends: 82 [2023-12-02 16:22:46,973 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 16:22:46,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 252 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:22:46,973 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 31 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:46,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 174 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:22:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 16:22:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2023-12-02 16:22:46,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 64 states have internal predecessors, (67), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:46,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-12-02 16:22:46,975 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 45 [2023-12-02 16:22:46,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:46,976 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-12-02 16:22:46,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 16:22:46,976 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-12-02 16:22:46,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 16:22:46,976 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:46,976 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:46,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (75)] Ended with exit code 0 [2023-12-02 16:22:47,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:47,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-12-02 16:22:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:22:47,577 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:47,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:47,578 INFO L85 PathProgramCache]: Analyzing trace with hash -662431726, now seen corresponding path program 1 times [2023-12-02 16:22:47,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630689492] [2023-12-02 16:22:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:47,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:22:47,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:47,579 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:47,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (78)] Waiting until timeout for monitored process [2023-12-02 16:22:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:22:47,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2023-12-02 16:22:47,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:22:48,400 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 16:22:48,810 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 15 treesize of output 7 [2023-12-02 16:22:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 16:22:48,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:22:49,255 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 30 treesize of output 24 [2023-12-02 16:22:49,361 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 30 treesize of output 24 [2023-12-02 16:22:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 16:22:49,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:22:49,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630689492] [2023-12-02 16:22:49,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630689492] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:22:49,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 16:22:49,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2023-12-02 16:22:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138357961] [2023-12-02 16:22:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:22:49,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 16:22:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:22:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 16:22:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-12-02 16:22:49,615 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 11 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:52,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:22:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:22:52,250 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2023-12-02 16:22:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:22:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2023-12-02 16:22:52,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:22:52,252 INFO L225 Difference]: With dead ends: 85 [2023-12-02 16:22:52,252 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 16:22:52,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-12-02 16:22:52,252 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:22:52,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 237 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 200 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 16:22:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 16:22:52,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2023-12-02 16:22:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 6 states have call successors, (6), 5 states have call predecessors, (6), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-02 16:22:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2023-12-02 16:22:52,255 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 46 [2023-12-02 16:22:52,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:22:52,255 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2023-12-02 16:22:52,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.0) internal successors, (27), 10 states have internal predecessors, (27), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 16:22:52,255 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2023-12-02 16:22:52,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 16:22:52,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:22:52,255 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2023-12-02 16:22:52,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (78)] Ended with exit code 0 [2023-12-02 16:22:52,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:52,456 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-12-02 16:22:52,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:22:52,456 INFO L85 PathProgramCache]: Analyzing trace with hash 939453087, now seen corresponding path program 1 times [2023-12-02 16:22:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:22:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686227622] [2023-12-02 16:22:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:22:52,457 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:22:52,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:22:52,457 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:52,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (79)] Waiting until timeout for monitored process [2023-12-02 16:22:52,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:22:52,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:22:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:22:52,817 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 16:22:52,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:22:52,818 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (29 of 30 remaining) [2023-12-02 16:22:52,819 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 30 remaining) [2023-12-02 16:22:52,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (18 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (17 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (16 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (13 of 30 remaining) [2023-12-02 16:22:52,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (12 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (11 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (10 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (9 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (8 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (7 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (6 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (5 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE (4 of 30 remaining) [2023-12-02 16:22:52,822 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE (3 of 30 remaining) [2023-12-02 16:22:52,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK (2 of 30 remaining) [2023-12-02 16:22:52,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_i2c_set_clientdataErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 30 remaining) [2023-12-02 16:22:52,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ldv_i2c_set_clientdataErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 30 remaining) [2023-12-02 16:22:52,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 (79)] Ended with exit code 0 [2023-12-02 16:22:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/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 16:22:53,025 INFO L445 BasicCegarLoop]: Path program 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 16:22:53,029 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:22:53,049 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret47 [2023-12-02 16:22:53,050 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret48 [2023-12-02 16:22:53,050 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret49 [2023-12-02 16:22:53,051 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret45 [2023-12-02 16:22:53,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:22:53 BoogieIcfgContainer [2023-12-02 16:22:53,061 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:22:53,061 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:22:53,061 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:22:53,061 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:22:53,062 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:18:25" (3/4) ... [2023-12-02 16:22:53,063 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 16:22:53,075 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret47 [2023-12-02 16:22:53,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret48 [2023-12-02 16:22:53,076 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret49 [2023-12-02 16:22:53,077 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret45 [2023-12-02 16:22:53,120 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 16:22:53,120 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:22:53,120 INFO L158 Benchmark]: Toolchain (without parser) took 268779.19ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 96.8MB in the beginning and 101.6MB in the end (delta: -4.8MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,121 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 37.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:22:53,121 INFO L158 Benchmark]: CACSL2BoogieTranslator took 623.57ms. Allocated memory is still 121.6MB. Free memory was 96.5MB in the beginning and 66.7MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,121 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.81ms. Allocated memory is still 121.6MB. Free memory was 66.7MB in the beginning and 63.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,121 INFO L158 Benchmark]: Boogie Preprocessor took 37.45ms. Allocated memory is still 121.6MB. Free memory was 63.6MB in the beginning and 61.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,122 INFO L158 Benchmark]: RCFGBuilder took 654.70ms. Allocated memory is still 121.6MB. Free memory was 61.4MB in the beginning and 76.3MB in the end (delta: -14.9MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,122 INFO L158 Benchmark]: TraceAbstraction took 267335.22ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 75.5MB in the beginning and 105.9MB in the end (delta: -30.3MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:22:53,122 INFO L158 Benchmark]: Witness Printer took 58.88ms. Allocated memory is still 146.8MB. Free memory was 105.9MB in the beginning and 101.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 16:22:53,123 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 60.8MB. Free memory is still 37.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 623.57ms. Allocated memory is still 121.6MB. Free memory was 96.5MB in the beginning and 66.7MB in the end (delta: 29.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.81ms. Allocated memory is still 121.6MB. Free memory was 66.7MB in the beginning and 63.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.45ms. Allocated memory is still 121.6MB. Free memory was 63.6MB in the beginning and 61.4MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 654.70ms. Allocated memory is still 121.6MB. Free memory was 61.4MB in the beginning and 76.3MB in the end (delta: -14.9MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * TraceAbstraction took 267335.22ms. Allocated memory was 121.6MB in the beginning and 146.8MB in the end (delta: 25.2MB). Free memory was 75.5MB in the beginning and 105.9MB in the end (delta: -30.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 58.88ms. Allocated memory is still 146.8MB. Free memory was 105.9MB in the beginning and 101.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret47 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret48 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret49 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret45 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret47 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret48 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret49 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret45 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 799]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; [L824] CALL entry_point() [L803] CALL, EXPR ldv_malloc(sizeof(struct ldv_i2c_client)) VAL [\old(size)=20, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L803] RET, EXPR ldv_malloc(sizeof(struct ldv_i2c_client)) VAL [ldv_global_msg_list={1:0}] [L803] struct ldv_i2c_client *c11 = (struct ldv_i2c_client *)ldv_malloc(sizeof(struct ldv_i2c_client)); [L804] COND FALSE !(!c11) VAL [c11={10:0}, ldv_global_msg_list={1:0}] [L806] CALL, EXPR ldv_malloc(sizeof(struct ldv_m88ts2022_config)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L806] RET, EXPR ldv_malloc(sizeof(struct ldv_m88ts2022_config)) VAL [c11={10:0}, ldv_global_msg_list={1:0}] [L805-L806] struct ldv_m88ts2022_config *cfg = (struct ldv_m88ts2022_config *) ldv_malloc(sizeof(struct ldv_m88ts2022_config)); [L807] COND FALSE !(!cfg) VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}] [L808] c11->dev.platform_data = cfg VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}] [L810] CALL, EXPR ldv_malloc(sizeof(struct ldv_dvb_frontend)) VAL [\old(size)=4, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L810] RET, EXPR ldv_malloc(sizeof(struct ldv_dvb_frontend)) VAL [c11={10:0}, cfg={5:0}, ldv_global_msg_list={1:0}] [L809-L810] struct ldv_dvb_frontend *fe = (struct ldv_dvb_frontend *) ldv_malloc(sizeof(struct ldv_dvb_frontend)); [L811] COND FALSE !(!fe) VAL [c11={10:0}, cfg={5:0}, fe={2:0}, ldv_global_msg_list={1:0}] [L812] cfg->fe = fe [L813] CALL alloc_2_11(c11) [L784] EXPR client->dev.platform_data [L784] struct ldv_m88ts2022_config *cfg = client->dev.platform_data; [L785] EXPR cfg->fe [L785] struct ldv_dvb_frontend *fe = cfg->fe; [L786] CALL, EXPR ldv_malloc(sizeof(struct Data11)) VAL [\old(size)=12, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L786] RET, EXPR ldv_malloc(sizeof(struct Data11)) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}] [L786] struct Data11 *priv = (struct Data11*)ldv_malloc(sizeof(struct Data11)); [L787] COND FALSE !(!priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L788] fe->tuner_priv = priv VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L789] CALL ldv_i2c_set_clientdata(client, priv) VAL [ldv_global_msg_list={1:0}] [L778] CALL ldv_dev_set_drvdata(&dev->dev, data) [L623] dev->driver_data = data [L778] RET ldv_dev_set_drvdata(&dev->dev, data) [L789] RET ldv_i2c_set_clientdata(client, priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) VAL [cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L790] free(priv) [L791] return 0; VAL [\result=0, cfg={5:0}, client={10:0}, client={10:0}, fe={2:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L813] RET alloc_2_11(c11) [L814] CALL free_11(c11) [L797] CALL, EXPR ldv_i2c_get_clientdata(client) [L774] CALL, EXPR ldv_dev_get_drvdata(&dev->dev) [L619] EXPR dev->driver_data [L619] return dev->driver_data; [L774] RET, EXPR ldv_dev_get_drvdata(&dev->dev) [L774] return ldv_dev_get_drvdata(&dev->dev); [L797] RET, EXPR ldv_i2c_get_clientdata(client) [L797] void *priv = (struct Data11*)ldv_i2c_get_clientdata(client); [L798] COND TRUE \read(*priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] [L799] free(priv) VAL [client={10:0}, client={10:0}, ldv_global_msg_list={1:0}, priv={3:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 790]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 799]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 815]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 817]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 819]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 823]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 80 locations, 30 error locations. Started 1 CEGAR loops. OverallTime: 267.3s, OverallIterations: 40, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 110.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 32 mSolverCounterUnknown, 3227 SdHoareTripleChecker+Valid, 83.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3159 mSDsluCounter, 14567 SdHoareTripleChecker+Invalid, 81.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2957 IncrementalHoareTripleChecker+Unchecked, 11895 mSDsCounter, 524 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11292 IncrementalHoareTripleChecker+Invalid, 14805 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 524 mSolverCounterUnsat, 2672 mSDtfsCounter, 11292 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3572 GetRequests, 2907 SyntacticMatches, 98 SemanticMatches, 567 ConstructedPredicates, 29 IntricatePredicates, 3 DeprecatedPredicates, 3529 ImplicationChecksByTransitivity, 138.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred in iteration=10, InterpolantAutomatonStates: 361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 972 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 3.3s SatisfiabilityAnalysisTime, 132.2s InterpolantComputationTime, 2382 NumberOfCodeBlocks, 2382 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 3151 ConstructedInterpolants, 382 QuantifiedInterpolants, 21223 SizeOfPredicates, 473 NumberOfNonLiveVariables, 9865 ConjunctsInSsa, 1444 ConjunctsInUnsatCore, 105 InterpolantComputations, 20 PerfectInterpolantSequences, 1288/1700 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-12-02 16:22:53,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc53dd7c-35c2-46db-93df-ce0a4f578769/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)