./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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 ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:14:48,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:14:48,634 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 14:14:48,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:14:48,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:14:48,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:14:48,665 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:14:48,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:14:48,667 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:14:48,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:14:48,668 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:14:48,668 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:14:48,669 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:14:48,669 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:14:48,670 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:14:48,670 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:14:48,671 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:14:48,672 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:14:48,672 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:14:48,673 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:14:48,673 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:14:48,674 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:14:48,675 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:14:48,675 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:14:48,676 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:14:48,677 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:14:48,677 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:14:48,678 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:14:48,678 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:14:48,678 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:14:48,679 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:14:48,679 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:14:48,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:14:48,680 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:14:48,680 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:14:48,680 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:14:48,681 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:14:48,681 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:14:48,681 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:14:48,681 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:14:48,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:48,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:14:48,682 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:14:48,682 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:14:48,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:14:48,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:14:48,683 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:14:48,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:14:48,683 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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-12-02 14:14:48,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:14:48,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:14:48,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:14:48,986 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:14:48,986 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:14:48,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-12-02 14:14:51,862 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:14:52,022 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:14:52,023 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-12-02 14:14:52,032 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/1e04d4ddf/fa8ef14e0eb54d69a03c1562b8f51daf/FLAGdc9a8215f [2023-12-02 14:14:52,047 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/1e04d4ddf/fa8ef14e0eb54d69a03c1562b8f51daf [2023-12-02 14:14:52,049 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:14:52,051 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:14:52,052 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:52,052 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:14:52,057 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:14:52,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:52" (1/1) ... [2023-12-02 14:14:52,059 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41f5d1ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:52, skipping insertion in model container [2023-12-02 14:14:52,060 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:52" (1/1) ... [2023-12-02 14:14:52,086 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:14:52,256 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:52,268 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 14:14:52,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@34b8d5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:52, skipping insertion in model container [2023-12-02 14:14:52,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:52,269 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 14:14:52,271 INFO L158 Benchmark]: Toolchain (without parser) took 219.64ms. Allocated memory is still 136.3MB. Free memory was 100.4MB in the beginning and 90.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 14:14:52,272 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 136.3MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:14:52,272 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.19ms. Allocated memory is still 136.3MB. Free memory was 100.4MB in the beginning and 90.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 14:14:52,274 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 136.3MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 217.19ms. Allocated memory is still 136.3MB. Free memory was 100.4MB in the beginning and 90.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 96]: 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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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 ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:14:54,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:14:54,105 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 14:14:54,111 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:14:54,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:14:54,140 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:14:54,141 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:14:54,142 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:14:54,142 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:14:54,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:14:54,143 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:14:54,144 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:14:54,144 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:14:54,145 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:14:54,146 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:14:54,146 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:14:54,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:14:54,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:14:54,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:14:54,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:14:54,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:14:54,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:14:54,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:14:54,151 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:14:54,151 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:14:54,152 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:14:54,152 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:14:54,153 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:14:54,153 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 14:14:54,153 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 14:14:54,154 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:14:54,154 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:14:54,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:14:54,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:14:54,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 14:14:54,155 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:14:54,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:14:54,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:54,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:14:54,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:14:54,156 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 14:14:54,157 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 14:14:54,157 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:14:54,157 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:14:54,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:14:54,158 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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ebdf94362dc31684fc6d7640230484df679da941d20fe978f9edfe1d75c48a51 [2023-12-02 14:14:54,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:14:54,491 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:14:54,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:14:54,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:14:54,495 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:14:54,496 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-12-02 14:14:57,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:14:57,502 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:14:57,503 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2023-12-02 14:14:57,511 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/f55684d14/a3a2811ca3c64fbb9cdd55ee2b83662e/FLAG71caa3749 [2023-12-02 14:14:57,523 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/data/f55684d14/a3a2811ca3c64fbb9cdd55ee2b83662e [2023-12-02 14:14:57,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:14:57,527 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:14:57,528 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:57,529 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:14:57,534 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:14:57,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,535 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fb9a1f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57, skipping insertion in model container [2023-12-02 14:14:57,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,558 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:14:57,727 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:57,741 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 14:14:57,746 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:14:57,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:57,771 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:14:57,797 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:14:57,807 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:14:57,808 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:14:57,814 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:14:57,814 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57 WrapperNode [2023-12-02 14:14:57,814 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:14:57,815 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:57,815 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:14:57,816 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:14:57,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,833 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,860 INFO L138 Inliner]: procedures = 28, calls = 41, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 148 [2023-12-02 14:14:57,860 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:14:57,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:14:57,862 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:14:57,862 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:14:57,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,875 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,884 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,891 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,893 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:14:57,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:14:57,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:14:57,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:14:57,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (1/1) ... [2023-12-02 14:14:57,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:14:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:14:57,925 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:14:57,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:14:57,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:14:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 14:14:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:14:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 14:14:57,969 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 14:14:57,969 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 14:14:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 14:14:57,970 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 14:14:57,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 14:14:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 14:14:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:14:57,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:14:57,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:14:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:14:57,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 14:14:57,973 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 14:14:58,120 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:14:58,122 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:14:58,519 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:14:58,797 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:14:58,797 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 14:14:58,798 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:58 BoogieIcfgContainer [2023-12-02 14:14:58,798 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:14:58,800 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:14:58,801 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:14:58,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:14:58,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:14:57" (1/3) ... [2023-12-02 14:14:58,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49930fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:58, skipping insertion in model container [2023-12-02 14:14:58,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:14:57" (2/3) ... [2023-12-02 14:14:58,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49930fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:14:58, skipping insertion in model container [2023-12-02 14:14:58,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:58" (3/3) ... [2023-12-02 14:14:58,807 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2023-12-02 14:14:58,827 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:14:58,827 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-12-02 14:14:58,827 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 14:14:58,882 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-02 14:14:58,912 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 48 transitions, 110 flow [2023-12-02 14:14:58,961 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 414 states, 370 states have (on average 2.8945945945945946) internal successors, (1071), 413 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:14:58,978 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:14:58,983 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;@57fe2393, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:14:58,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-12-02 14:14:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 414 states, 370 states have (on average 2.8945945945945946) internal successors, (1071), 413 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:14:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:14:58,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:14:58,992 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:14:58,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:14:58,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:14:58,997 INFO L85 PathProgramCache]: Analyzing trace with hash 479407, now seen corresponding path program 1 times [2023-12-02 14:14:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:14:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621775021] [2023-12-02 14:14:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:14:59,011 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 14:14:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:14:59,054 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:14:59,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:14:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:14:59,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 14:14:59,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:14:59,229 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 14:14:59,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:14:59,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:14:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 14:14:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:14:59,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:14:59,304 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 14:14:59,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:14:59,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:14:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621775021] [2023-12-02 14:14:59,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621775021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:14:59,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:14:59,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:14:59,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194772420] [2023-12-02 14:14:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:14:59,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:14:59,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:14:59,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:14:59,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:14:59,343 INFO L87 Difference]: Start difference. First operand has 414 states, 370 states have (on average 2.8945945945945946) internal successors, (1071), 413 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:14:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:14:59,518 INFO L93 Difference]: Finished difference Result 411 states and 1068 transitions. [2023-12-02 14:14:59,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:14:59,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:14:59,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:14:59,538 INFO L225 Difference]: With dead ends: 411 [2023-12-02 14:14:59,538 INFO L226 Difference]: Without dead ends: 411 [2023-12-02 14:14:59,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:14:59,543 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:14:59,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:14:59,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-12-02 14:14:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 411. [2023-12-02 14:14:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 369 states have (on average 2.894308943089431) internal successors, (1068), 410 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:14:59,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1068 transitions. [2023-12-02 14:14:59,619 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1068 transitions. Word has length 3 [2023-12-02 14:14:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:14:59,620 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 1068 transitions. [2023-12-02 14:14:59,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:14:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1068 transitions. [2023-12-02 14:14:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:14:59,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:14:59,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:14:59,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-12-02 14:14:59,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:14:59,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:14:59,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:14:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash 479408, now seen corresponding path program 1 times [2023-12-02 14:14:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:14:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163481475] [2023-12-02 14:14:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:14:59,824 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 14:14:59,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:14:59,825 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:14:59,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:14:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:14:59,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:14:59,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:14:59,907 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 7 [2023-12-02 14:14:59,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:14:59,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:14:59,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:14:59,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:14:59,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:00,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:00,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:00,088 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 14:15:00,088 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:00,089 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:00,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163481475] [2023-12-02 14:15:00,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163481475] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:00,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:15:00,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016953861] [2023-12-02 14:15:00,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:15:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:00,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:15:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:15:00,092 INFO L87 Difference]: Start difference. First operand 411 states and 1068 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:00,413 INFO L93 Difference]: Finished difference Result 413 states and 1071 transitions. [2023-12-02 14:15:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:15:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:15:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:00,419 INFO L225 Difference]: With dead ends: 413 [2023-12-02 14:15:00,419 INFO L226 Difference]: Without dead ends: 413 [2023-12-02 14:15:00,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:15:00,421 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:00,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 39 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:15:00,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-12-02 14:15:00,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 413. [2023-12-02 14:15:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 371 states have (on average 2.8867924528301887) internal successors, (1071), 412 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:00,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1071 transitions. [2023-12-02 14:15:00,450 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1071 transitions. Word has length 3 [2023-12-02 14:15:00,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:00,450 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 1071 transitions. [2023-12-02 14:15:00,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1071 transitions. [2023-12-02 14:15:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:15:00,451 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:00,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:15:00,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-02 14:15:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:00,653 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:00,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:00,654 INFO L85 PathProgramCache]: Analyzing trace with hash 479457, now seen corresponding path program 1 times [2023-12-02 14:15:00,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:00,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572917122] [2023-12-02 14:15:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:00,655 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 14:15:00,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:00,656 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:00,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:00,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:15:00,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:00,732 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:15:00,732 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 19 treesize of output 22 [2023-12-02 14:15:00,766 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-12-02 14:15:00,767 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 1 case distinctions, treesize of input 24 treesize of output 22 [2023-12-02 14:15:00,827 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 14:15:00,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:00,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:00,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572917122] [2023-12-02 14:15:00,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572917122] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:00,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:00,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:15:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764849802] [2023-12-02 14:15:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:00,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:15:00,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:15:00,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:00,831 INFO L87 Difference]: Start difference. First operand 413 states and 1071 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:00,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:01,000 INFO L93 Difference]: Finished difference Result 348 states and 878 transitions. [2023-12-02 14:15:01,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:15:01,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:15:01,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:01,004 INFO L225 Difference]: With dead ends: 348 [2023-12-02 14:15:01,004 INFO L226 Difference]: Without dead ends: 348 [2023-12-02 14:15:01,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:01,006 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:01,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 9 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:15:01,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-02 14:15:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2023-12-02 14:15:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 316 states have (on average 2.778481012658228) internal successors, (878), 347 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 878 transitions. [2023-12-02 14:15:01,023 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 878 transitions. Word has length 3 [2023-12-02 14:15:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:01,023 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 878 transitions. [2023-12-02 14:15:01,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 878 transitions. [2023-12-02 14:15:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:15:01,024 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:01,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:15:01,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,227 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:01,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 479458, now seen corresponding path program 1 times [2023-12-02 14:15:01,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:01,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116660620] [2023-12-02 14:15:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:01,228 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 14:15:01,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:01,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:01,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:15:01,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:01,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:01,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:01,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 14:15:01,344 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 10 treesize of output 8 [2023-12-02 14:15:01,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:01,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 14:15:01,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:01,391 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 5 treesize of output 3 [2023-12-02 14:15:01,526 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 14:15:01,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:01,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:01,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116660620] [2023-12-02 14:15:01,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116660620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:01,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:15:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429007539] [2023-12-02 14:15:01,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:01,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:15:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:15:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:01,528 INFO L87 Difference]: Start difference. First operand 348 states and 878 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:01,709 INFO L93 Difference]: Finished difference Result 283 states and 685 transitions. [2023-12-02 14:15:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:15:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 14:15:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:01,712 INFO L225 Difference]: With dead ends: 283 [2023-12-02 14:15:01,712 INFO L226 Difference]: Without dead ends: 283 [2023-12-02 14:15:01,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:01,714 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:01,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 8 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:15:01,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-12-02 14:15:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2023-12-02 14:15:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 261 states have (on average 2.624521072796935) internal successors, (685), 282 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 685 transitions. [2023-12-02 14:15:01,740 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 685 transitions. Word has length 3 [2023-12-02 14:15:01,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:01,740 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 685 transitions. [2023-12-02 14:15:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 685 transitions. [2023-12-02 14:15:01,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 14:15:01,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:01,741 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-12-02 14:15:01,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:01,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:01,950 INFO L85 PathProgramCache]: Analyzing trace with hash 460725372, now seen corresponding path program 1 times [2023-12-02 14:15:01,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:01,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839408961] [2023-12-02 14:15:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:01,951 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 14:15:01,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:01,952 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:01,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 14:15:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:01,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:15:01,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:02,012 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 7 [2023-12-02 14:15:02,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:02,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:02,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:02,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:02,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839408961] [2023-12-02 14:15:02,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839408961] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:02,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042499276] [2023-12-02 14:15:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:02,647 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:02,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:02,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:02,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 14:15:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:02,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:02,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:02,774 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 7 [2023-12-02 14:15:02,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:02,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:02,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:02,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:03,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042499276] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:03,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70666355] [2023-12-02 14:15:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:03,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:03,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:03,048 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:03,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 14:15:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:03,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:15:03,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:03,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:03,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:03,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:03,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:03,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:03,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:03,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:03,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:03,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:03,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70666355] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:03,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-12-02 14:15:03,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420091254] [2023-12-02 14:15:03,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 14:15:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:03,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 14:15:03,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-02 14:15:03,379 INFO L87 Difference]: Start difference. First operand 283 states and 685 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:04,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:04,074 INFO L93 Difference]: Finished difference Result 289 states and 694 transitions. [2023-12-02 14:15:04,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 14:15:04,074 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 14:15:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:04,077 INFO L225 Difference]: With dead ends: 289 [2023-12-02 14:15:04,077 INFO L226 Difference]: Without dead ends: 289 [2023-12-02 14:15:04,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-12-02 14:15:04,078 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:04,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 14:15:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-12-02 14:15:04,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-12-02 14:15:04,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 267 states have (on average 2.599250936329588) internal successors, (694), 288 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 694 transitions. [2023-12-02 14:15:04,088 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 694 transitions. Word has length 5 [2023-12-02 14:15:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:04,088 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 694 transitions. [2023-12-02 14:15:04,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 694 transitions. [2023-12-02 14:15:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:15:04,088 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:04,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:15:04,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 14:15:04,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 14:15:04,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 14:15:04,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:04,690 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:04,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:04,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044573, now seen corresponding path program 1 times [2023-12-02 14:15:04,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:04,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518456513] [2023-12-02 14:15:04,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:04,691 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 14:15:04,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:04,692 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:04,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 14:15:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:04,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 14:15:04,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:04,760 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:15:04,760 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-12-02 14:15:04,776 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:15:04,777 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 1 case distinctions, treesize of input 9 treesize of output 15 [2023-12-02 14:15:04,798 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 14:15:04,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 15 [2023-12-02 14:15:04,892 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 14:15:04,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:04,893 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518456513] [2023-12-02 14:15:04,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518456513] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:04,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:04,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:15:04,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806163719] [2023-12-02 14:15:04,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:04,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:15:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:04,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:15:04,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:04,895 INFO L87 Difference]: Start difference. First operand 289 states and 694 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:05,037 INFO L93 Difference]: Finished difference Result 273 states and 662 transitions. [2023-12-02 14:15:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:15:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 14:15:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:05,040 INFO L225 Difference]: With dead ends: 273 [2023-12-02 14:15:05,040 INFO L226 Difference]: Without dead ends: 273 [2023-12-02 14:15:05,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:05,041 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:05,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 7 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:15:05,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-12-02 14:15:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2023-12-02 14:15:05,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 257 states have (on average 2.575875486381323) internal successors, (662), 272 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 662 transitions. [2023-12-02 14:15:05,050 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 662 transitions. Word has length 6 [2023-12-02 14:15:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:05,050 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 662 transitions. [2023-12-02 14:15:05,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 662 transitions. [2023-12-02 14:15:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 14:15:05,051 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:05,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 14:15:05,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 14:15:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:05,252 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:05,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:05,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1399044574, now seen corresponding path program 1 times [2023-12-02 14:15:05,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:05,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470581758] [2023-12-02 14:15:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:05,253 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 14:15:05,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:05,253 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:05,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 14:15:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:05,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 14:15:05,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:05,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 14:15:05,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,343 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 14:15:05,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:15:05,380 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 14:15:05,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:05,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:05,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1470581758] [2023-12-02 14:15:05,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1470581758] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:05,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:05,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:15:05,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14761021] [2023-12-02 14:15:05,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:05,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:15:05,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:05,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:15:05,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:05,382 INFO L87 Difference]: Start difference. First operand 273 states and 662 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:05,510 INFO L93 Difference]: Finished difference Result 257 states and 630 transitions. [2023-12-02 14:15:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:15:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 14:15:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:05,513 INFO L225 Difference]: With dead ends: 257 [2023-12-02 14:15:05,513 INFO L226 Difference]: Without dead ends: 257 [2023-12-02 14:15:05,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:05,514 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:05,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 6 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:15:05,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-12-02 14:15:05,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2023-12-02 14:15:05,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 247 states have (on average 2.5506072874493926) internal successors, (630), 256 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 630 transitions. [2023-12-02 14:15:05,525 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 630 transitions. Word has length 6 [2023-12-02 14:15:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:05,525 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 630 transitions. [2023-12-02 14:15:05,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 630 transitions. [2023-12-02 14:15:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:15:05,526 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:05,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:05,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-02 14:15:05,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:05,727 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:05,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 420749007, now seen corresponding path program 1 times [2023-12-02 14:15:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:05,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953955850] [2023-12-02 14:15:05,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:05,727 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 14:15:05,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:05,728 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:05,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:05,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 14:15:05,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:05,780 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 14:15:05,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:15:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 14:15:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:15:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 14:15:05,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:05,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 14:15:05,839 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 14:15:05,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:05,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:05,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953955850] [2023-12-02 14:15:05,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953955850] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:05,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:05,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:15:05,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824084804] [2023-12-02 14:15:05,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:05,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 14:15:05,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:05,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 14:15:05,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 14:15:05,841 INFO L87 Difference]: Start difference. First operand 257 states and 630 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:05,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:05,993 INFO L93 Difference]: Finished difference Result 206 states and 498 transitions. [2023-12-02 14:15:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 14:15:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 14:15:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:05,995 INFO L225 Difference]: With dead ends: 206 [2023-12-02 14:15:05,995 INFO L226 Difference]: Without dead ends: 206 [2023-12-02 14:15:05,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 14:15:05,996 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:05,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:15:05,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-02 14:15:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2023-12-02 14:15:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 2.4776119402985075) internal successors, (498), 205 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 498 transitions. [2023-12-02 14:15:06,004 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 498 transitions. Word has length 7 [2023-12-02 14:15:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:06,004 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 498 transitions. [2023-12-02 14:15:06,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 498 transitions. [2023-12-02 14:15:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 14:15:06,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:06,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:06,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 14:15:06,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:06,205 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:06,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 420749008, now seen corresponding path program 1 times [2023-12-02 14:15:06,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:06,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876960114] [2023-12-02 14:15:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:06,206 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 14:15:06,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:06,207 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:06,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:06,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:15:06,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:06,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:06,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:06,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:06,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:06,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:06,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:06,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:06,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:06,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:06,455 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 14:15:06,455 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:06,455 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:06,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876960114] [2023-12-02 14:15:06,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876960114] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:06,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:06,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:15:06,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048958330] [2023-12-02 14:15:06,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:06,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:15:06,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:06,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:15:06,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:15:06,457 INFO L87 Difference]: Start difference. First operand 206 states and 498 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:06,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:06,919 INFO L93 Difference]: Finished difference Result 320 states and 818 transitions. [2023-12-02 14:15:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:15:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 14:15:06,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:06,922 INFO L225 Difference]: With dead ends: 320 [2023-12-02 14:15:06,923 INFO L226 Difference]: Without dead ends: 320 [2023-12-02 14:15:06,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:15:06,924 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 62 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:06,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 19 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:15:06,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-12-02 14:15:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 272. [2023-12-02 14:15:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 2.599250936329588) internal successors, (694), 271 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 694 transitions. [2023-12-02 14:15:06,935 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 694 transitions. Word has length 7 [2023-12-02 14:15:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:06,935 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 694 transitions. [2023-12-02 14:15:06,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:06,936 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 694 transitions. [2023-12-02 14:15:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 14:15:06,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:06,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:06,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:07,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:07,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:07,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 635101206, now seen corresponding path program 1 times [2023-12-02 14:15:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71227643] [2023-12-02 14:15:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:07,141 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 14:15:07,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:07,142 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:07,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 14:15:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:07,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:15:07,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:07,221 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 7 [2023-12-02 14:15:07,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:07,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:07,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:07,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:07,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:07,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:07,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:07,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:07,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:07,426 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 14:15:07,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:07,426 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71227643] [2023-12-02 14:15:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71227643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:07,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:07,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:15:07,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355644844] [2023-12-02 14:15:07,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:07,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:15:07,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:15:07,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:15:07,428 INFO L87 Difference]: Start difference. First operand 272 states and 694 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:07,842 INFO L93 Difference]: Finished difference Result 419 states and 1118 transitions. [2023-12-02 14:15:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:15:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 14:15:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:07,846 INFO L225 Difference]: With dead ends: 419 [2023-12-02 14:15:07,847 INFO L226 Difference]: Without dead ends: 419 [2023-12-02 14:15:07,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 14:15:07,847 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:07,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 24 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 14:15:07,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-12-02 14:15:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 353. [2023-12-02 14:15:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 2.7011494252873565) internal successors, (940), 352 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 940 transitions. [2023-12-02 14:15:07,860 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 940 transitions. Word has length 10 [2023-12-02 14:15:07,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:07,860 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 940 transitions. [2023-12-02 14:15:07,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 940 transitions. [2023-12-02 14:15:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 14:15:07,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:07,862 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-12-02 14:15:07,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 14:15:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:08,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:08,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 202304992, now seen corresponding path program 2 times [2023-12-02 14:15:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:08,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893463423] [2023-12-02 14:15:08,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:15:08,067 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 14:15:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:08,068 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:08,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-02 14:15:08,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:15:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:08,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:15:08,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:08,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 14:15:08,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:08,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:08,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:08,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:08,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:08,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:08,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:08,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:08,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:08,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:09,173 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:09,173 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:09,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893463423] [2023-12-02 14:15:09,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893463423] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:09,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604299477] [2023-12-02 14:15:09,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:15:09,174 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:09,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:09,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:09,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-12-02 14:15:09,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:15:09,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:09,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:15:09,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:09,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:09,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:09,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:09,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:09,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:09,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:09,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:09,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:09,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:09,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:09,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:10,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604299477] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:10,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999373436] [2023-12-02 14:15:10,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:15:10,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:10,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:10,533 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:10,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 14:15:10,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:15:10,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:10,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:15:10,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:10,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:10,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:10,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:10,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:10,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:10,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:10,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:10,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:10,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:10,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:11,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999373436] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:11,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:11,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2023-12-02 14:15:11,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494333936] [2023-12-02 14:15:11,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:11,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 14:15:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 14:15:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-12-02 14:15:11,109 INFO L87 Difference]: Start difference. First operand 353 states and 940 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:14,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:14,652 INFO L93 Difference]: Finished difference Result 365 states and 958 transitions. [2023-12-02 14:15:14,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-02 14:15:14,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 14:15:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:14,655 INFO L225 Difference]: With dead ends: 365 [2023-12-02 14:15:14,655 INFO L226 Difference]: Without dead ends: 365 [2023-12-02 14:15:14,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2023-12-02 14:15:14,656 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:14,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 14:15:14,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2023-12-02 14:15:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2023-12-02 14:15:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 360 states have (on average 2.661111111111111) internal successors, (958), 364 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:14,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 958 transitions. [2023-12-02 14:15:14,665 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 958 transitions. Word has length 11 [2023-12-02 14:15:14,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:14,666 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 958 transitions. [2023-12-02 14:15:14,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 958 transitions. [2023-12-02 14:15:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 14:15:14,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:14,668 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:14,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 14:15:14,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-12-02 14:15:15,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 14:15:15,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:15,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:15,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:15,269 INFO L85 PathProgramCache]: Analyzing trace with hash 573619637, now seen corresponding path program 1 times [2023-12-02 14:15:15,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:15,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383237695] [2023-12-02 14:15:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:15,270 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 14:15:15,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:15,271 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:15,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 14:15:15,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:15,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:15:15,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:15,347 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 7 [2023-12-02 14:15:15,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:15,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:15,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:15,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:15,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:15,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:15,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:15,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:15,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:15,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:15,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:15,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383237695] [2023-12-02 14:15:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383237695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:15,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:15:15,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223333692] [2023-12-02 14:15:15,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:15:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:15:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:15:15,531 INFO L87 Difference]: Start difference. First operand 365 states and 958 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:15,864 INFO L93 Difference]: Finished difference Result 442 states and 1109 transitions. [2023-12-02 14:15:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:15:15,864 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 14:15:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:15,867 INFO L225 Difference]: With dead ends: 442 [2023-12-02 14:15:15,867 INFO L226 Difference]: Without dead ends: 415 [2023-12-02 14:15:15,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 14:15:15,868 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:15,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:15:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-12-02 14:15:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 406. [2023-12-02 14:15:15,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 401 states have (on average 2.5910224438902745) internal successors, (1039), 405 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1039 transitions. [2023-12-02 14:15:15,877 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1039 transitions. Word has length 11 [2023-12-02 14:15:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:15,877 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 1039 transitions. [2023-12-02 14:15:15,877 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1039 transitions. [2023-12-02 14:15:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:15:15,878 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:15,879 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:15,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2023-12-02 14:15:16,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:16,080 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:16,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1512897921, now seen corresponding path program 1 times [2023-12-02 14:15:16,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [451827437] [2023-12-02 14:15:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:16,081 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:15:16,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:16,082 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:16,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:16,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:15:16,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:16,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:16,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:16,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:16,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:16,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:16,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:16,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:16,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:16,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:16,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:15:16,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:15:17,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [451827437] [2023-12-02 14:15:17,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [451827437] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:17,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [570911554] [2023-12-02 14:15:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:17,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:17,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:17,059 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:17,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 14:15:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:17,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:17,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:17,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [570911554] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:17,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012186264] [2023-12-02 14:15:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:17,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:17,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:17,878 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:17,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 14:15:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:17,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:15:17,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:18,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:18,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012186264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:18,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:18,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 30 [2023-12-02 14:15:18,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482987892] [2023-12-02 14:15:18,296 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:18,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 14:15:18,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:18,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 14:15:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:15:18,298 INFO L87 Difference]: Start difference. First operand 406 states and 1039 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:21,730 INFO L93 Difference]: Finished difference Result 1137 states and 2999 transitions. [2023-12-02 14:15:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 14:15:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 14:15:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:21,737 INFO L225 Difference]: With dead ends: 1137 [2023-12-02 14:15:21,737 INFO L226 Difference]: Without dead ends: 1137 [2023-12-02 14:15:21,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 14:15:21,738 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 499 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:21,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 124 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 14:15:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2023-12-02 14:15:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 990. [2023-12-02 14:15:21,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 985 states have (on average 2.7543147208121828) internal successors, (2713), 989 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 2713 transitions. [2023-12-02 14:15:21,771 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 2713 transitions. Word has length 13 [2023-12-02 14:15:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:21,772 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 2713 transitions. [2023-12-02 14:15:21,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 2713 transitions. [2023-12-02 14:15:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 14:15:21,773 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:21,774 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:21,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-02 14:15:21,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 14:15:22,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:22,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:22,375 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:22,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash 319900335, now seen corresponding path program 1 times [2023-12-02 14:15:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [805019460] [2023-12-02 14:15:22,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:22,376 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 14:15:22,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:22,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:22,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:22,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:15:22,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:22,476 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 7 [2023-12-02 14:15:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:22,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:22,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:22,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:22,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:22,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:22,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:22,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:22,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:15:22,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:15:23,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [805019460] [2023-12-02 14:15:23,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [805019460] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:23,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1413058098] [2023-12-02 14:15:23,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:23,479 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:23,479 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:23,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 14:15:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:23,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 14:15:23,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:23,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1413058098] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:24,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042314335] [2023-12-02 14:15:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:24,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:24,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:24,321 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:24,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 14:15:24,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:24,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:15:24,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:24,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:24,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042314335] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:24,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:24,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 30 [2023-12-02 14:15:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497881297] [2023-12-02 14:15:24,694 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:24,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 14:15:24,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 14:15:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2023-12-02 14:15:24,696 INFO L87 Difference]: Start difference. First operand 990 states and 2713 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:28,210 INFO L93 Difference]: Finished difference Result 1971 states and 5452 transitions. [2023-12-02 14:15:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 14:15:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 14:15:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:28,222 INFO L225 Difference]: With dead ends: 1971 [2023-12-02 14:15:28,222 INFO L226 Difference]: Without dead ends: 1971 [2023-12-02 14:15:28,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=346, Invalid=1634, Unknown=0, NotChecked=0, Total=1980 [2023-12-02 14:15:28,223 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 452 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:28,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 226 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 14:15:28,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2023-12-02 14:15:28,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1803. [2023-12-02 14:15:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1803 states, 1798 states have (on average 2.8598442714126806) internal successors, (5142), 1802 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 5142 transitions. [2023-12-02 14:15:28,261 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 5142 transitions. Word has length 16 [2023-12-02 14:15:28,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:28,261 INFO L495 AbstractCegarLoop]: Abstraction has 1803 states and 5142 transitions. [2023-12-02 14:15:28,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:28,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 5142 transitions. [2023-12-02 14:15:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 14:15:28,262 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:28,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:15:28,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:28,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 14:15:28,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 14:15:28,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:28,864 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:28,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1419272839, now seen corresponding path program 1 times [2023-12-02 14:15:28,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:28,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420789052] [2023-12-02 14:15:28,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:15:28,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:15:28,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:28,865 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:28,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:15:28,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 14:15:28,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:28,961 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 14:15:28,962 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:15:28,962 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420789052] [2023-12-02 14:15:28,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420789052] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:15:28,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:15:28,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 14:15:28,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240820468] [2023-12-02 14:15:28,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:15:28,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:15:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:15:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:28,963 INFO L87 Difference]: Start difference. First operand 1803 states and 5142 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:29,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:15:29,127 INFO L93 Difference]: Finished difference Result 1861 states and 5248 transitions. [2023-12-02 14:15:29,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:15:29,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 14:15:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:15:29,138 INFO L225 Difference]: With dead ends: 1861 [2023-12-02 14:15:29,138 INFO L226 Difference]: Without dead ends: 1813 [2023-12-02 14:15:29,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:15:29,139 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:15:29,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 18 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:15:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1813 states. [2023-12-02 14:15:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1813 to 1786. [2023-12-02 14:15:29,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1781 states have (on average 2.8652442448062887) internal successors, (5103), 1785 states have internal predecessors, (5103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 5103 transitions. [2023-12-02 14:15:29,176 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 5103 transitions. Word has length 19 [2023-12-02 14:15:29,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:15:29,176 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 5103 transitions. [2023-12-02 14:15:29,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:15:29,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 5103 transitions. [2023-12-02 14:15:29,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 14:15:29,178 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:15:29,178 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2023-12-02 14:15:29,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:29,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:29,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:15:29,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:15:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1156841560, now seen corresponding path program 3 times [2023-12-02 14:15:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:15:29,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228932716] [2023-12-02 14:15:29,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:15:29,379 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 14:15:29,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:15:29,380 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:29,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:15:29,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 14:15:29,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:29,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 14:15:29,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:29,661 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 7 [2023-12-02 14:15:29,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:29,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:29,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:29,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:29,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:29,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:29,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:29,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:29,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:30,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:33,034 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:15:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228932716] [2023-12-02 14:15:33,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228932716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:33,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740538111] [2023-12-02 14:15:33,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:15:33,034 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:15:33,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:15:33,035 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:15:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 14:15:33,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 14:15:33,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:33,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 14:15:33,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:33,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:15:33,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:33,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:33,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:33,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:34,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:34,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:34,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:15:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:34,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:34,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740538111] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:34,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675336475] [2023-12-02 14:15:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:15:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:15:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:15:34,936 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:15:34,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 14:15:39,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 14:15:39,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:15:39,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 14:15:39,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:15:40,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 14:15:40,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:40,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:40,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:40,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:40,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:40,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:40,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:15:40,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:15:40,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:15:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:40,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:15:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:15:44,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675336475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:15:44,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:15:44,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 34 [2023-12-02 14:15:44,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91148634] [2023-12-02 14:15:44,363 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:15:44,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 14:15:44,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:15:44,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 14:15:44,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 14:15:44,366 INFO L87 Difference]: Start difference. First operand 1786 states and 5103 transitions. Second operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:15,305 INFO L93 Difference]: Finished difference Result 1810 states and 5139 transitions. [2023-12-02 14:16:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-12-02 14:16:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 14:16:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:15,316 INFO L225 Difference]: With dead ends: 1810 [2023-12-02 14:16:15,316 INFO L226 Difference]: Without dead ends: 1810 [2023-12-02 14:16:15,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=1343, Invalid=3079, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 14:16:15,319 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:15,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 101 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 14:16:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2023-12-02 14:16:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 1810. [2023-12-02 14:16:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1805 states have (on average 2.8470914127423823) internal successors, (5139), 1809 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 5139 transitions. [2023-12-02 14:16:15,375 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 5139 transitions. Word has length 23 [2023-12-02 14:16:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:15,375 INFO L495 AbstractCegarLoop]: Abstraction has 1810 states and 5139 transitions. [2023-12-02 14:16:15,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 5139 transitions. [2023-12-02 14:16:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:15,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:15,379 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:15,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:15,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2023-12-02 14:16:15,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 14:16:15,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:15,980 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:15,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 907974254, now seen corresponding path program 1 times [2023-12-02 14:16:15,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:15,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650931823] [2023-12-02 14:16:15,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:15,981 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 14:16:15,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:15,982 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:15,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-12-02 14:16:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:16,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:16:16,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:16,113 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 7 [2023-12-02 14:16:16,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:16,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:16,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:16,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:16,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:16,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:16,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:16,275 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 13 treesize of output 9 [2023-12-02 14:16:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:16,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:16,627 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650931823] [2023-12-02 14:16:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650931823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:16,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316541374] [2023-12-02 14:16:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:16,627 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:16,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:16,628 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:16,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 14:16:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:16,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:16,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:17,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316541374] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:17,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746673042] [2023-12-02 14:16:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:17,356 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:17,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 14:16:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:17,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:17,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:17,621 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746673042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:17,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 14:16:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 8, 8] total 24 [2023-12-02 14:16:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58780843] [2023-12-02 14:16:17,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:17,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:16:17,622 INFO L87 Difference]: Start difference. First operand 1810 states and 5139 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:17,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:17,939 INFO L93 Difference]: Finished difference Result 1960 states and 5545 transitions. [2023-12-02 14:16:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:16:17,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:17,953 INFO L225 Difference]: With dead ends: 1960 [2023-12-02 14:16:17,953 INFO L226 Difference]: Without dead ends: 1960 [2023-12-02 14:16:17,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2023-12-02 14:16:17,954 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:17,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2023-12-02 14:16:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1819. [2023-12-02 14:16:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1814 states have (on average 2.84619625137817) internal successors, (5163), 1818 states have internal predecessors, (5163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 5163 transitions. [2023-12-02 14:16:17,988 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 5163 transitions. Word has length 27 [2023-12-02 14:16:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:17,989 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 5163 transitions. [2023-12-02 14:16:17,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 5163 transitions. [2023-12-02 14:16:17,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:17,991 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:17,991 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:17,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-12-02 14:16:18,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2023-12-02 14:16:18,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:18,592 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:18,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1483565900, now seen corresponding path program 1 times [2023-12-02 14:16:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252576371] [2023-12-02 14:16:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:18,593 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 14:16:18,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:18,594 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:18,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-12-02 14:16:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:18,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:16:18,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:18,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 14:16:18,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:18,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:18,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:18,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:18,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:18,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:18,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:18,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:18,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:18,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:18,897 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 13 treesize of output 9 [2023-12-02 14:16:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:18,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:19,228 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252576371] [2023-12-02 14:16:19,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252576371] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:19,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1105630345] [2023-12-02 14:16:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:19,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:19,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:19,229 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:19,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 14:16:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:19,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:19,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:19,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:19,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1105630345] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:19,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241047981] [2023-12-02 14:16:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:19,916 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:19,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 14:16:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:20,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:20,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:20,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:20,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241047981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:20,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 14:16:20,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 8, 8] total 24 [2023-12-02 14:16:20,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792467853] [2023-12-02 14:16:20,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:20,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:20,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:20,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:16:20,208 INFO L87 Difference]: Start difference. First operand 1819 states and 5163 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:20,492 INFO L93 Difference]: Finished difference Result 1909 states and 5397 transitions. [2023-12-02 14:16:20,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:20,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:20,503 INFO L225 Difference]: With dead ends: 1909 [2023-12-02 14:16:20,503 INFO L226 Difference]: Without dead ends: 1906 [2023-12-02 14:16:20,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:16:20,504 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:20,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 51 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2023-12-02 14:16:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1819. [2023-12-02 14:16:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1814 states have (on average 2.8445424476295478) internal successors, (5160), 1818 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:20,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 5160 transitions. [2023-12-02 14:16:20,538 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 5160 transitions. Word has length 27 [2023-12-02 14:16:20,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:20,539 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 5160 transitions. [2023-12-02 14:16:20,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:20,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 5160 transitions. [2023-12-02 14:16:20,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:20,542 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:20,542 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:20,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:20,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 14:16:20,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:21,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:21,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:21,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:21,144 INFO L85 PathProgramCache]: Analyzing trace with hash -648996788, now seen corresponding path program 2 times [2023-12-02 14:16:21,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:21,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005355598] [2023-12-02 14:16:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:21,144 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 14:16:21,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:21,152 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:21,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-12-02 14:16:21,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:21,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:21,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 14:16:21,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:21,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:21,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005355598] [2023-12-02 14:16:21,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005355598] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:16:21,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:16:21,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-12-02 14:16:21,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826034587] [2023-12-02 14:16:21,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:21,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:16:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:16:21,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-02 14:16:21,535 INFO L87 Difference]: Start difference. First operand 1819 states and 5160 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:21,826 INFO L93 Difference]: Finished difference Result 2731 states and 7591 transitions. [2023-12-02 14:16:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:16:21,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:21,846 INFO L225 Difference]: With dead ends: 2731 [2023-12-02 14:16:21,846 INFO L226 Difference]: Without dead ends: 2725 [2023-12-02 14:16:21,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-12-02 14:16:21,847 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:21,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 46 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:16:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2725 states. [2023-12-02 14:16:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2725 to 1819. [2023-12-02 14:16:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1814 states have (on average 2.842888643880926) internal successors, (5157), 1818 states have internal predecessors, (5157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 5157 transitions. [2023-12-02 14:16:21,886 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 5157 transitions. Word has length 27 [2023-12-02 14:16:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:21,886 INFO L495 AbstractCegarLoop]: Abstraction has 1819 states and 5157 transitions. [2023-12-02 14:16:21,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 5157 transitions. [2023-12-02 14:16:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:21,888 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:21,895 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:21,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2023-12-02 14:16:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:22,100 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:22,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:22,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1214745868, now seen corresponding path program 2 times [2023-12-02 14:16:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:22,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666113611] [2023-12-02 14:16:22,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:22,101 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 14:16:22,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:22,102 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:22,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 14:16:22,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:22,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:16:22,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:22,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:22,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666113611] [2023-12-02 14:16:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666113611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101298797] [2023-12-02 14:16:22,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:22,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:22,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:22,852 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:22,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 14:16:23,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:23,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:23,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:23,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:23,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2101298797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633839810] [2023-12-02 14:16:23,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:23,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:23,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:23,391 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:23,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 14:16:23,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:23,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:23,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:23,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:23,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:23,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633839810] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:23,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 14:16:23,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 9, 6, 6] total 27 [2023-12-02 14:16:23,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039454213] [2023-12-02 14:16:23,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:23,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:23,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:23,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:23,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2023-12-02 14:16:23,674 INFO L87 Difference]: Start difference. First operand 1819 states and 5157 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:24,059 INFO L93 Difference]: Finished difference Result 2254 states and 6187 transitions. [2023-12-02 14:16:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 14:16:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:24,069 INFO L225 Difference]: With dead ends: 2254 [2023-12-02 14:16:24,069 INFO L226 Difference]: Without dead ends: 2254 [2023-12-02 14:16:24,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-12-02 14:16:24,070 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 83 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:24,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 61 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2023-12-02 14:16:24,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 1753. [2023-12-02 14:16:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1748 states have (on average 2.8220823798627004) internal successors, (4933), 1752 states have internal predecessors, (4933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:24,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4933 transitions. [2023-12-02 14:16:24,108 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4933 transitions. Word has length 27 [2023-12-02 14:16:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:24,108 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 4933 transitions. [2023-12-02 14:16:24,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:24,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4933 transitions. [2023-12-02 14:16:24,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:24,111 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:24,111 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:24,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 14:16:24,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 14:16:24,525 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 14:16:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:24,712 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:24,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:24,712 INFO L85 PathProgramCache]: Analyzing trace with hash -291989744, now seen corresponding path program 3 times [2023-12-02 14:16:24,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:24,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318266509] [2023-12-02 14:16:24,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:16:24,713 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 14:16:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:24,714 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:24,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 14:16:24,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:16:24,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:24,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:24,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:24,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:24,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318266509] [2023-12-02 14:16:24,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318266509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:24,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:24,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:16:24,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964724506] [2023-12-02 14:16:24,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:24,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:24,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:24,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:24,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:24,905 INFO L87 Difference]: Start difference. First operand 1753 states and 4933 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:25,204 INFO L93 Difference]: Finished difference Result 1891 states and 5193 transitions. [2023-12-02 14:16:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:25,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:25,210 INFO L225 Difference]: With dead ends: 1891 [2023-12-02 14:16:25,210 INFO L226 Difference]: Without dead ends: 1876 [2023-12-02 14:16:25,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:25,211 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:25,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 60 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2023-12-02 14:16:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 1753. [2023-12-02 14:16:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1748 states have (on average 2.818649885583524) internal successors, (4927), 1752 states have internal predecessors, (4927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 4927 transitions. [2023-12-02 14:16:25,246 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 4927 transitions. Word has length 27 [2023-12-02 14:16:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:25,246 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 4927 transitions. [2023-12-02 14:16:25,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 4927 transitions. [2023-12-02 14:16:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:25,248 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:25,248 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:25,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 14:16:25,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:25,449 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:25,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:25,450 INFO L85 PathProgramCache]: Analyzing trace with hash 597700994, now seen corresponding path program 4 times [2023-12-02 14:16:25,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:25,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1811590268] [2023-12-02 14:16:25,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:25,450 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 14:16:25,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:25,451 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:25,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:25,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:25,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:25,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:16:25,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:25,599 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 7 [2023-12-02 14:16:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:25,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:25,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:25,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:25,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:25,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:25,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:25,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:25,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:25,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:25,737 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 13 treesize of output 9 [2023-12-02 14:16:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:25,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:26,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1811590268] [2023-12-02 14:16:26,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1811590268] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:26,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1275919581] [2023-12-02 14:16:26,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:26,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:26,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:26,189 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:26,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 14:16:26,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:26,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:26,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:16:26,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:26,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1275919581] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18258115] [2023-12-02 14:16:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:26,988 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:26,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 14:16:27,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:27,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:27,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:27,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:27,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:27,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18258115] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:16:27,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2023-12-02 14:16:27,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 9, 9, 5] total 30 [2023-12-02 14:16:27,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644584154] [2023-12-02 14:16:27,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:27,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:16:27,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:27,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:16:27,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2023-12-02 14:16:27,437 INFO L87 Difference]: Start difference. First operand 1753 states and 4927 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:27,799 INFO L93 Difference]: Finished difference Result 1891 states and 5186 transitions. [2023-12-02 14:16:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:16:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:27,804 INFO L225 Difference]: With dead ends: 1891 [2023-12-02 14:16:27,804 INFO L226 Difference]: Without dead ends: 1891 [2023-12-02 14:16:27,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-12-02 14:16:27,805 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:27,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2023-12-02 14:16:27,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1696. [2023-12-02 14:16:27,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1691 states have (on average 2.7882909520993495) internal successors, (4715), 1695 states have internal predecessors, (4715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4715 transitions. [2023-12-02 14:16:27,835 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4715 transitions. Word has length 27 [2023-12-02 14:16:27,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:27,836 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 4715 transitions. [2023-12-02 14:16:27,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:27,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4715 transitions. [2023-12-02 14:16:27,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:27,844 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:27,844 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:27,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:28,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:28,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:28,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:28,445 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:28,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:28,445 INFO L85 PathProgramCache]: Analyzing trace with hash 419150658, now seen corresponding path program 3 times [2023-12-02 14:16:28,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:28,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607725450] [2023-12-02 14:16:28,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 14:16:28,446 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 14:16:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:28,446 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:28,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:28,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 14:16:28,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:28,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:28,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:28,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:28,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:28,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607725450] [2023-12-02 14:16:28,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607725450] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:28,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:16:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:16:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283384883] [2023-12-02 14:16:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:28,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:28,642 INFO L87 Difference]: Start difference. First operand 1696 states and 4715 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:28,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:28,951 INFO L93 Difference]: Finished difference Result 1768 states and 4837 transitions. [2023-12-02 14:16:28,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:28,952 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:28,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:28,956 INFO L225 Difference]: With dead ends: 1768 [2023-12-02 14:16:28,957 INFO L226 Difference]: Without dead ends: 1762 [2023-12-02 14:16:28,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:16:28,957 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:28,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 59 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1762 states. [2023-12-02 14:16:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1762 to 1696. [2023-12-02 14:16:28,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1691 states have (on average 2.7865168539325844) internal successors, (4712), 1695 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 4712 transitions. [2023-12-02 14:16:28,991 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 4712 transitions. Word has length 27 [2023-12-02 14:16:28,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:28,992 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 4712 transitions. [2023-12-02 14:16:28,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:28,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 4712 transitions. [2023-12-02 14:16:28,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:28,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:28,994 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:28,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:29,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:29,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:29,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1948925280, now seen corresponding path program 5 times [2023-12-02 14:16:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:29,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [883384293] [2023-12-02 14:16:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 14:16:29,195 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 14:16:29,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:29,196 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:29,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-12-02 14:16:29,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-02 14:16:29,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:29,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:16:29,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:29,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:16:29,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:29,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:29,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:29,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:29,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:29,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:29,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:29,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:29,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:29,585 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 13 treesize of output 9 [2023-12-02 14:16:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:29,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:30,057 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [883384293] [2023-12-02 14:16:30,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [883384293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:30,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660561720] [2023-12-02 14:16:30,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 14:16:30,058 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:30,059 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:30,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2023-12-02 14:16:30,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-02 14:16:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:30,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:30,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:30,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1660561720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:30,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827473040] [2023-12-02 14:16:30,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 14:16:30,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:30,832 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:30,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 14:16:30,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-12-02 14:16:30,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:30,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:30,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:31,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827473040] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:31,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 14:16:31,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 7, 8, 8] total 26 [2023-12-02 14:16:31,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896678054] [2023-12-02 14:16:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:31,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:31,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:31,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=517, Unknown=0, NotChecked=0, Total=702 [2023-12-02 14:16:31,134 INFO L87 Difference]: Start difference. First operand 1696 states and 4712 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:31,451 INFO L93 Difference]: Finished difference Result 2017 states and 5586 transitions. [2023-12-02 14:16:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:16:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:31,457 INFO L225 Difference]: With dead ends: 2017 [2023-12-02 14:16:31,457 INFO L226 Difference]: Without dead ends: 2017 [2023-12-02 14:16:31,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=555, Unknown=0, NotChecked=0, Total=756 [2023-12-02 14:16:31,458 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:31,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 46 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 14:16:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2023-12-02 14:16:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1690. [2023-12-02 14:16:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1685 states have (on average 2.7833827893175074) internal successors, (4690), 1689 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:31,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 4690 transitions. [2023-12-02 14:16:31,490 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 4690 transitions. Word has length 27 [2023-12-02 14:16:31,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:31,491 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 4690 transitions. [2023-12-02 14:16:31,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:31,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 4690 transitions. [2023-12-02 14:16:31,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:31,492 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:31,492 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:31,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 14:16:31,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:31,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-12-02 14:16:32,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:32,093 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:32,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:32,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1135809026, now seen corresponding path program 4 times [2023-12-02 14:16:32,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:32,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013028488] [2023-12-02 14:16:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:32,094 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 14:16:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:32,095 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:32,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 14:16:32,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:32,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:32,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 14:16:32,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:32,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:16:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:32,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:32,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:32,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:32,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:32,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:32,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:32,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:32,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:32,400 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 13 treesize of output 9 [2023-12-02 14:16:32,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:32,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:32,785 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013028488] [2023-12-02 14:16:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013028488] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [12108360] [2023-12-02 14:16:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:32,785 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:32,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:32,786 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:32,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 14:16:32,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:32,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:32,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 14:16:32,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:33,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:33,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [12108360] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:33,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655807032] [2023-12-02 14:16:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 14:16:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:33,511 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:33,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 14:16:33,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 14:16:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:33,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 14:16:33,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:33,801 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 14:16:33,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655807032] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:16:33,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-12-02 14:16:33,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 8, 8] total 24 [2023-12-02 14:16:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442229989] [2023-12-02 14:16:33,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:33,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:16:33,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:16:33,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:16:33,803 INFO L87 Difference]: Start difference. First operand 1690 states and 4690 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:34,040 INFO L93 Difference]: Finished difference Result 1786 states and 4940 transitions. [2023-12-02 14:16:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:16:34,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:34,046 INFO L225 Difference]: With dead ends: 1786 [2023-12-02 14:16:34,046 INFO L226 Difference]: Without dead ends: 1783 [2023-12-02 14:16:34,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-12-02 14:16:34,047 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 46 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:34,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 44 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:16:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-12-02 14:16:34,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1690. [2023-12-02 14:16:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1685 states have (on average 2.78160237388724) internal successors, (4687), 1689 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 4687 transitions. [2023-12-02 14:16:34,089 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 4687 transitions. Word has length 27 [2023-12-02 14:16:34,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:34,090 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 4687 transitions. [2023-12-02 14:16:34,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 4687 transitions. [2023-12-02 14:16:34,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:34,092 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:34,092 INFO L195 NwaCegarLoop]: trace histogram [2, 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 14:16:34,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 14:16:34,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2023-12-02 14:16:34,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 14:16:34,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:34,693 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:34,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:34,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1351588622, now seen corresponding path program 6 times [2023-12-02 14:16:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:34,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012370908] [2023-12-02 14:16:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-02 14:16:34,694 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 14:16:34,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:34,695 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:34,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:34,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-12-02 14:16:34,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:34,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 14:16:34,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:34,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 14:16:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:34,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:34,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:34,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:34,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:34,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:34,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:34,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:34,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:34,919 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 13 treesize of output 9 [2023-12-02 14:16:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:16:34,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 14:16:35,081 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:35,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012370908] [2023-12-02 14:16:35,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012370908] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 14:16:35,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 14:16:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-12-02 14:16:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109916857] [2023-12-02 14:16:35,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:16:35,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 14:16:35,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:35,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 14:16:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 14:16:35,083 INFO L87 Difference]: Start difference. First operand 1690 states and 4687 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:35,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:35,250 INFO L93 Difference]: Finished difference Result 1690 states and 4684 transitions. [2023-12-02 14:16:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 14:16:35,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:35,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:35,257 INFO L225 Difference]: With dead ends: 1690 [2023-12-02 14:16:35,257 INFO L226 Difference]: Without dead ends: 1690 [2023-12-02 14:16:35,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-12-02 14:16:35,258 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:35,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 20 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:16:35,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2023-12-02 14:16:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1687. [2023-12-02 14:16:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1682 states have (on average 2.780023781212842) internal successors, (4676), 1686 states have internal predecessors, (4676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 4676 transitions. [2023-12-02 14:16:35,298 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 4676 transitions. Word has length 27 [2023-12-02 14:16:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:35,298 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 4676 transitions. [2023-12-02 14:16:35,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 4676 transitions. [2023-12-02 14:16:35,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 14:16:35,300 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:35,300 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 14:16:35,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:35,501 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:35,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:35,501 INFO L85 PathProgramCache]: Analyzing trace with hash 361583612, now seen corresponding path program 2 times [2023-12-02 14:16:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:35,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294730114] [2023-12-02 14:16:35,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:35,502 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 14:16:35,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:35,503 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:35,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:35,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:35,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:35,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 14:16:35,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:35,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-12-02 14:16:35,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:35,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:35,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:35,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:35,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:35,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:35,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 14:16:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:36,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:16:38,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:16:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294730114] [2023-12-02 14:16:38,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294730114] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:38,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128900052] [2023-12-02 14:16:38,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:38,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:16:38,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:16:38,048 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:16:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 14:16:38,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:38,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:38,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:16:38,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:16:39,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 14:16:40,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128900052] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:40,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066830723] [2023-12-02 14:16:40,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:16:40,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:16:40,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:16:40,108 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:16:40,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 14:16:40,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:16:40,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 14:16:40,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 14:16:40,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:40,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 14:16:40,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:40,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:40,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:40,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:40,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 14:16:40,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 14:16:40,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 14:16:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:41,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:43,000 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 14:16:43,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066830723] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:16:43,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:16:43,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 9, 9] total 49 [2023-12-02 14:16:43,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114456303] [2023-12-02 14:16:43,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:16:43,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 14:16:43,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:16:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 14:16:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 14:16:43,003 INFO L87 Difference]: Start difference. First operand 1687 states and 4676 transitions. Second operand has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:16:58,507 INFO L93 Difference]: Finished difference Result 4232 states and 11808 transitions. [2023-12-02 14:16:58,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 14:16:58,509 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 14:16:58,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:16:58,515 INFO L225 Difference]: With dead ends: 4232 [2023-12-02 14:16:58,515 INFO L226 Difference]: Without dead ends: 4232 [2023-12-02 14:16:58,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=578, Invalid=4534, Unknown=0, NotChecked=0, Total=5112 [2023-12-02 14:16:58,517 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 428 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 3683 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 3695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:16:58,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 494 Invalid, 3695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3683 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-12-02 14:16:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2023-12-02 14:16:58,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 2732. [2023-12-02 14:16:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 2727 states have (on average 2.804913824715805) internal successors, (7649), 2731 states have internal predecessors, (7649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:58,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 7649 transitions. [2023-12-02 14:16:58,582 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 7649 transitions. Word has length 27 [2023-12-02 14:16:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:16:58,582 INFO L495 AbstractCegarLoop]: Abstraction has 2732 states and 7649 transitions. [2023-12-02 14:16:58,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.52) internal successors, (126), 49 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:16:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 7649 transitions. [2023-12-02 14:16:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 14:16:58,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:16:58,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:16:58,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 14:16:58,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2023-12-02 14:16:58,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 14:16:59,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:59,185 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:16:59,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:16:59,186 INFO L85 PathProgramCache]: Analyzing trace with hash -370236763, now seen corresponding path program 1 times [2023-12-02 14:16:59,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:16:59,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518666729] [2023-12-02 14:16:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:16:59,186 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 14:16:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:16:59,187 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:16:59,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 14:16:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:16:59,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 14:16:59,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:16:59,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:16:59,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 18 [2023-12-02 14:16:59,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:16:59,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:16:59,882 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-12-02 14:16:59,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 89 treesize of output 68 [2023-12-02 14:17:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:17:01,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 14:17:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518666729] [2023-12-02 14:17:01,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518666729] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:17:01,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [339323805] [2023-12-02 14:17:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:17:01,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 14:17:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 14:17:01,607 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 14:17:01,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2023-12-02 14:17:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:17:01,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 14:17:01,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:17:02,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:17:02,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 60 [2023-12-02 14:17:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:17:02,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:17:02,823 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-12-02 14:17:02,824 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 183 treesize of output 91 [2023-12-02 14:17:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:17:04,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [339323805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:17:04,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823495356] [2023-12-02 14:17:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:17:04,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 14:17:04,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:17:04,977 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 14:17:04,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-12-02 14:17:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:17:05,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 14:17:05,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 14:17:05,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 14:17:05,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 85 [2023-12-02 14:17:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:17:05,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 14:17:06,523 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-12-02 14:17:06,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 322 treesize of output 125 [2023-12-02 14:17:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 14:17:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823495356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 14:17:29,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 14:17:29,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9, 7, 9, 7] total 23 [2023-12-02 14:17:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687426561] [2023-12-02 14:17:29,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 14:17:29,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 14:17:29,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 14:17:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 14:17:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=457, Unknown=3, NotChecked=0, Total=552 [2023-12-02 14:17:29,464 INFO L87 Difference]: Start difference. First operand 2732 states and 7649 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:17:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:17:54,058 INFO L93 Difference]: Finished difference Result 4441 states and 12429 transitions. [2023-12-02 14:17:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 14:17:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 14:17:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:17:54,065 INFO L225 Difference]: With dead ends: 4441 [2023-12-02 14:17:54,065 INFO L226 Difference]: Without dead ends: 4370 [2023-12-02 14:17:54,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 138 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=190, Invalid=863, Unknown=3, NotChecked=0, Total=1056 [2023-12-02 14:17:54,066 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 192 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2023-12-02 14:17:54,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 116 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2023-12-02 14:17:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2023-12-02 14:17:54,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3101. [2023-12-02 14:17:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3101 states, 3096 states have (on average 2.8087855297157622) internal successors, (8696), 3100 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:17:54,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3101 states to 3101 states and 8696 transitions. [2023-12-02 14:17:54,120 INFO L78 Accepts]: Start accepts. Automaton has 3101 states and 8696 transitions. Word has length 29 [2023-12-02 14:17:54,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:17:54,121 INFO L495 AbstractCegarLoop]: Abstraction has 3101 states and 8696 transitions. [2023-12-02 14:17:54,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 23 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:17:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3101 states and 8696 transitions. [2023-12-02 14:17:54,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 14:17:54,123 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:17:54,123 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:17:54,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2023-12-02 14:17:54,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-12-02 14:17:54,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2023-12-02 14:17:54,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:17:54,724 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-12-02 14:17:54,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:17:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -850159041, now seen corresponding path program 2 times [2023-12-02 14:17:54,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 14:17:54,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [729899425] [2023-12-02 14:17:54,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 14:17:54,725 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 14:17:54,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 14:17:54,726 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:17:54,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2023-12-02 14:17:54,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 14:17:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-02 14:17:54,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:17:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:17:55,100 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 14:17:55,100 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:17:55,101 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (21 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-12-02 14:17:55,103 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-12-02 14:17:55,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK (6 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-12-02 14:17:55,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-12-02 14:17:55,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2023-12-02 14:17:55,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_004a6204-cf14-4a74-b57d-fc7f1b13f32a/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 14:17:55,309 INFO L445 BasicCegarLoop]: Path program histogram: [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:17:55,314 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-02 14:17:55,314 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 14:17:55,349 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-02 14:17:55,351 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated [2023-12-02 14:17:55,351 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated [2023-12-02 14:17:55,352 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-12-02 14:17:55,354 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-02 14:17:55,354 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-12-02 14:17:55,354 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated [2023-12-02 14:17:55,355 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-12-02 14:17:55,355 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated [2023-12-02 14:17:55,363 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 02:17:55 BasicIcfg [2023-12-02 14:17:55,364 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 14:17:55,364 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 14:17:55,364 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 14:17:55,365 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 14:17:55,365 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:14:58" (3/4) ... [2023-12-02 14:17:55,366 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 14:17:55,367 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 14:17:55,368 INFO L158 Benchmark]: Toolchain (without parser) took 177840.75ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 73.0MB in the beginning and 29.3MB in the end (delta: 43.8MB). Peak memory consumption was 90.5MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,368 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 65.0MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:17:55,368 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.23ms. Allocated memory is still 96.5MB. Free memory was 72.8MB in the beginning and 59.0MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,369 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.49ms. Allocated memory is still 96.5MB. Free memory was 59.0MB in the beginning and 56.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,369 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 96.5MB. Free memory was 56.9MB in the beginning and 54.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,369 INFO L158 Benchmark]: RCFGBuilder took 899.45ms. Allocated memory is still 96.5MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 60.9kB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,369 INFO L158 Benchmark]: TraceAbstraction took 176563.33ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 54.0MB in the beginning and 30.3MB in the end (delta: 23.7MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. [2023-12-02 14:17:55,370 INFO L158 Benchmark]: Witness Printer took 3.26ms. Allocated memory is still 142.6MB. Free memory was 30.3MB in the beginning and 29.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 14:17:55,371 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 65.0MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.23ms. Allocated memory is still 96.5MB. Free memory was 72.8MB in the beginning and 59.0MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.49ms. Allocated memory is still 96.5MB. Free memory was 59.0MB in the beginning and 56.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 96.5MB. Free memory was 56.9MB in the beginning and 54.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 899.45ms. Allocated memory is still 96.5MB. Free memory was 54.9MB in the beginning and 54.8MB in the end (delta: 60.9kB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. * TraceAbstraction took 176563.33ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 54.0MB in the beginning and 30.3MB in the end (delta: 23.7MB). Peak memory consumption was 69.4MB. Max. memory is 16.1GB. * Witness Printer took 3.26ms. Allocated memory is still 142.6MB. Free memory was 30.3MB in the beginning and 29.3MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre9 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~pre11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem13 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem14 could not be translated - 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 - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L41] 0 int* A; [L42] 0 int counter, N; [L75] 0 pthread_t t1, t2; [L77] 0 N = __VERIFIER_nondet_int() [L78] CALL, EXPR 0 create_fresh_int_array(N) [L93] CALL 0 assume_abort_if_not(size >= 0) [L38] COND FALSE 0 !(!cond) [L93] RET 0 assume_abort_if_not(size >= 0) [L94] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L38] COND FALSE 0 !(!cond) [L94] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L96] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L97] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=0, size=1] [L97] COND TRUE 0 i < size [L98] 0 arr[i] = __VERIFIER_nondet_int() [L97] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={3:0}, counter=0, i=1, size=1] [L97] COND FALSE 0 !(i < size) [L100] 0 return arr; [L78] RET, EXPR 0 create_fresh_int_array(N) [L78] 0 A = create_fresh_int_array(N) [L81] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={3:0}, N=1, counter=0, t1={23:0}, t2={17:0}] [L49] 1 int i=0; VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L82] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={3:0}, N=1, counter=0, t1={23:0}, t2={17:0}] [L62] 2 int i=0; VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=0, i=0] [L62] COND TRUE 2 i= b - 2147483648) [L38] COND FALSE 2 !(!cond) [L104] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L105] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L38] COND FALSE 2 !(!cond) [L105] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L106] 2 return a - b; [L64] RET, EXPR 2 minus(counter, A[i]) [L64] 2 int tmp = minus(counter, A[i]); [L83] 0 \read(t1) VAL [A={3:0}, N=1, counter=0, t1={23:0}, t2={17:0}] [L49] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L38] COND FALSE 1 !(!cond) [L110] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L111] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L38] COND FALSE 1 !(!cond) [L111] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L112] 1 return a + b; [L51] RET, EXPR 1 plus(counter, A[i]) [L51] 1 int tmp = plus(counter, A[i]); [L54] 1 counter = tmp VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=-1073741824, i=0, tmp=-1073741824] [L49] 1 i++ VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=-1073741824, i=1, tmp=-1073741824] [L67] 2 counter = tmp VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=1073741824, i=0, tmp=1073741824] [L62] 2 i++ VAL [A={3:0}, N=1, _argptr={0:0}, _argptr={0:0}, counter=1073741824, i=1, tmp=1073741824] [L62] COND FALSE 2 !(i