./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:56:25,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:56:25,074 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:56:25,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:56:25,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:56:25,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:56:25,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:56:25,115 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:56:25,117 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:56:25,118 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:56:25,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:56:25,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:56:25,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:56:25,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:56:25,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:56:25,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:56:25,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:56:25,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:56:25,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:56:25,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:56:25,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:56:25,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:56:25,136 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:56:25,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:56:25,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:56:25,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:56:25,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:56:25,141 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:56:25,142 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:56:25,143 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:56:25,143 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:56:25,144 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:56:25,145 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:56:25,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:56:25,146 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:56:25,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:56:25,147 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:56:25,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:56:25,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:56:25,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:56:25,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:56:25,158 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 10:56:25,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:56:25,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:56:25,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:56:25,202 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:56:25,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:56:25,203 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:56:25,203 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:56:25,203 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:56:25,203 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:56:25,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:56:25,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:56:25,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:56:25,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:56:25,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:56:25,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 10:56:25,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:56:25,207 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:56:25,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:56:25,207 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:56:25,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:56:25,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:56:25,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:56:25,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:56:25,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:56:25,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:56:25,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-16 10:56:25,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:56:25,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:56:25,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:56:25,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:56:25,512 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:56:25,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 10:56:25,577 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/22127c885/bba75b8e541745549035904f015dac74/FLAG0682e12ad [2022-11-16 10:56:26,010 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:56:26,016 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 10:56:26,026 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/22127c885/bba75b8e541745549035904f015dac74/FLAG0682e12ad [2022-11-16 10:56:26,390 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/22127c885/bba75b8e541745549035904f015dac74 [2022-11-16 10:56:26,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:56:26,394 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:56:26,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:56:26,396 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:56:26,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:56:26,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:56:26" (1/1) ... [2022-11-16 10:56:26,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e4c81d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:26, skipping insertion in model container [2022-11-16 10:56:26,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:56:26" (1/1) ... [2022-11-16 10:56:26,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:56:26,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:56:26,664 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 10:56:26,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:56:26,682 ERROR L326 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) [2022-11-16 10:56:26,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@27a0d83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:26, skipping insertion in model container [2022-11-16 10:56:26,683 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:56:26,683 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 10:56:26,685 INFO L158 Benchmark]: Toolchain (without parser) took 290.13ms. Allocated memory is still 134.2MB. Free memory was 94.2MB in the beginning and 110.0MB in the end (delta: -15.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 10:56:26,686 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory was 111.2MB in the beginning and 111.2MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 10:56:26,687 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.22ms. Allocated memory is still 134.2MB. Free memory was 94.0MB in the beginning and 110.0MB in the end (delta: -16.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 10:56:26,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 134.2MB. Free memory was 111.2MB in the beginning and 111.2MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 287.22ms. Allocated memory is still 134.2MB. Free memory was 94.0MB in the beginning and 110.0MB in the end (delta: -16.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 10:56:28,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:56:28,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:56:28,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:56:28,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:56:28,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:56:28,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:56:28,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:56:28,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:56:28,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:56:28,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:56:28,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:56:28,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:56:28,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:56:28,837 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:56:28,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:56:28,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:56:28,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:56:28,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:56:28,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:56:28,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:56:28,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:56:28,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:56:28,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:56:28,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:56:28,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:56:28,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:56:28,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:56:28,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:56:28,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:56:28,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:56:28,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:56:28,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:56:28,858 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:56:28,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:56:28,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:56:28,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:56:28,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:56:28,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:56:28,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:56:28,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:56:28,878 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 10:56:28,918 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:56:28,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:56:28,919 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:56:28,920 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:56:28,921 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:56:28,921 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:56:28,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:56:28,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:56:28,923 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:56:28,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:56:28,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:56:28,924 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:56:28,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:56:28,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:56:28,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:56:28,925 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 10:56:28,926 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 10:56:28,926 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 10:56:28,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:56:28,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 10:56:28,927 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 10:56:28,927 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 10:56:28,927 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:56:28,927 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:56:28,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:56:28,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:56:28,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:56:28,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:56:28,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:56:28,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:56:28,929 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 10:56:28,929 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 10:56:28,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 10:56:28,930 INFO L138 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_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ca4c99e545bc332635ee8b9969d24118d6fd539f8535aa6ae4c72d296ec330e [2022-11-16 10:56:29,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:56:29,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:56:29,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:56:29,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:56:29,364 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:56:29,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 10:56:29,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/87a82857c/c1540856dcd5426a8be88fb7c673e542/FLAGbee71397e [2022-11-16 10:56:29,919 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:56:29,926 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2022-11-16 10:56:29,948 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/87a82857c/c1540856dcd5426a8be88fb7c673e542/FLAGbee71397e [2022-11-16 10:56:30,452 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/data/87a82857c/c1540856dcd5426a8be88fb7c673e542 [2022-11-16 10:56:30,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:56:30,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:56:30,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:56:30,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:56:30,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:56:30,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d6d16e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30, skipping insertion in model container [2022-11-16 10:56:30,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:56:30,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:56:30,689 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 10:56:30,721 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:56:30,755 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 10:56:30,759 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:56:30,774 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 10:56:30,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:56:30,783 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:56:30,806 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/sv-benchmarks/c/weaver/chl-word-symm.wvr.c[2848,2861] [2022-11-16 10:56:30,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:56:30,825 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:56:30,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30 WrapperNode [2022-11-16 10:56:30,826 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:56:30,827 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:56:30,827 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:56:30,827 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:56:30,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,870 INFO L138 Inliner]: procedures = 26, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 122 [2022-11-16 10:56:30,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:56:30,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:56:30,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:56:30,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:56:30,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:56:30,953 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:56:30,953 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:56:30,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:56:30,954 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (1/1) ... [2022-11-16 10:56:30,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:56:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:30,992 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:56:31,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:56:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:56:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 10:56:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:56:31,056 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 10:56:31,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 10:56:31,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 10:56:31,057 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 10:56:31,057 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 10:56:31,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 10:56:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:56:31,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:56:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:56:31,058 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 10:56:31,060 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 10:56:31,220 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:56:31,222 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:56:32,024 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:56:32,034 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:56:32,034 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 10:56:32,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:56:32 BoogieIcfgContainer [2022-11-16 10:56:32,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:56:32,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:56:32,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:56:32,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:56:32,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:56:30" (1/3) ... [2022-11-16 10:56:32,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0976d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:56:32, skipping insertion in model container [2022-11-16 10:56:32,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:56:30" (2/3) ... [2022-11-16 10:56:32,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c0976d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:56:32, skipping insertion in model container [2022-11-16 10:56:32,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:56:32" (3/3) ... [2022-11-16 10:56:32,045 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-11-16 10:56:32,063 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:56:32,063 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-16 10:56:32,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 10:56:32,257 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 10:56:32,332 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 10:56:32,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 252 transitions, 520 flow [2022-11-16 10:56:32,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 252 transitions, 520 flow [2022-11-16 10:56:32,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 252 transitions, 520 flow [2022-11-16 10:56:32,476 INFO L130 PetriNetUnfolder]: 21/250 cut-off events. [2022-11-16 10:56:32,477 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 10:56:32,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 250 events. 21/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 395 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 164. Up to 3 conditions per place. [2022-11-16 10:56:32,488 INFO L119 LiptonReduction]: Number of co-enabled transitions 4636 [2022-11-16 10:57:03,735 INFO L134 LiptonReduction]: Checked pairs total: 7551 [2022-11-16 10:57:03,735 INFO L136 LiptonReduction]: Total number of compositions: 294 [2022-11-16 10:57:03,744 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 57 transitions, 130 flow [2022-11-16 10:57:03,808 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 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) [2022-11-16 10:57:03,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:57:03,833 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;@d478a78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:57:03,833 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2022-11-16 10:57:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 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) [2022-11-16 10:57:03,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 10:57:03,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:03,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 10:57:03,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:03,847 INFO L85 PathProgramCache]: Analyzing trace with hash 31487, now seen corresponding path program 1 times [2022-11-16 10:57:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:03,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824880139] [2022-11-16 10:57:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:03,860 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 [2022-11-16 10:57:03,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:03,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:03,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:04,119 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:57:04,120 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:57:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:04,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:04,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:04,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824880139] [2022-11-16 10:57:04,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824880139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:04,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:04,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:04,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073513965] [2022-11-16 10:57:04,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:04,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:04,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:04,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:04,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:04,233 INFO L87 Difference]: Start difference. First operand has 729 states, 443 states have (on average 4.6613995485327315) internal successors, (2065), 728 states have internal predecessors, (2065), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:04,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:04,912 INFO L93 Difference]: Finished difference Result 973 states and 2765 transitions. [2022-11-16 10:57:04,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 10:57:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:04,935 INFO L225 Difference]: With dead ends: 973 [2022-11-16 10:57:04,939 INFO L226 Difference]: Without dead ends: 973 [2022-11-16 10:57:04,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:04,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:04,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 10:57:04,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-11-16 10:57:05,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 490. [2022-11-16 10:57:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 321 states have (on average 4.336448598130841) internal successors, (1392), 489 states have internal predecessors, (1392), 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) [2022-11-16 10:57:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1392 transitions. [2022-11-16 10:57:05,053 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1392 transitions. Word has length 2 [2022-11-16 10:57:05,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:05,053 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1392 transitions. [2022-11-16 10:57:05,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1392 transitions. [2022-11-16 10:57:05,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 10:57:05,056 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:05,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 10:57:05,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:05,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:05,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:05,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:05,269 INFO L85 PathProgramCache]: Analyzing trace with hash 31486, now seen corresponding path program 1 times [2022-11-16 10:57:05,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:05,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [740447579] [2022-11-16 10:57:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:05,273 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 [2022-11-16 10:57:05,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:05,274 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:05,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:05,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 10:57:05,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:05,414 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:57:05,414 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:57:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:05,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:05,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:05,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [740447579] [2022-11-16 10:57:05,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [740447579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:05,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:05,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:05,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544509413] [2022-11-16 10:57:05,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:05,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:05,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:05,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:05,450 INFO L87 Difference]: Start difference. First operand 490 states and 1392 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:05,731 INFO L93 Difference]: Finished difference Result 488 states and 1388 transitions. [2022-11-16 10:57:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-16 10:57:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:05,738 INFO L225 Difference]: With dead ends: 488 [2022-11-16 10:57:05,738 INFO L226 Difference]: Without dead ends: 488 [2022-11-16 10:57:05,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:05,739 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:05,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:57:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-16 10:57:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-11-16 10:57:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 321 states have (on average 4.32398753894081) internal successors, (1388), 487 states have internal predecessors, (1388), 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) [2022-11-16 10:57:05,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 1388 transitions. [2022-11-16 10:57:05,794 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 1388 transitions. Word has length 2 [2022-11-16 10:57:05,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:05,794 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 1388 transitions. [2022-11-16 10:57:05,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 1388 transitions. [2022-11-16 10:57:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 10:57:05,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:05,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 10:57:05,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:05,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:05,996 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:05,997 INFO L85 PathProgramCache]: Analyzing trace with hash 985116, now seen corresponding path program 1 times [2022-11-16 10:57:05,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:05,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854959318] [2022-11-16 10:57:05,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:05,998 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 [2022-11-16 10:57:05,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:05,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:06,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:06,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 10:57:06,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:06,142 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 10:57:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 10:57:06,218 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 10:57:06,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:06,245 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:06,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854959318] [2022-11-16 10:57:06,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854959318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:06,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:06,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:06,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836198545] [2022-11-16 10:57:06,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:06,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:06,247 INFO L87 Difference]: Start difference. First operand 488 states and 1388 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) [2022-11-16 10:57:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:06,498 INFO L93 Difference]: Finished difference Result 489 states and 1391 transitions. [2022-11-16 10:57:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:06,499 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 [2022-11-16 10:57:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:06,502 INFO L225 Difference]: With dead ends: 489 [2022-11-16 10:57:06,502 INFO L226 Difference]: Without dead ends: 489 [2022-11-16 10:57:06,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:06,504 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:06,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-16 10:57:06,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-11-16 10:57:06,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 489. [2022-11-16 10:57:06,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 322 states have (on average 4.319875776397516) internal successors, (1391), 488 states have internal predecessors, (1391), 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) [2022-11-16 10:57:06,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1391 transitions. [2022-11-16 10:57:06,528 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1391 transitions. Word has length 3 [2022-11-16 10:57:06,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:06,529 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 1391 transitions. [2022-11-16 10:57:06,530 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) [2022-11-16 10:57:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1391 transitions. [2022-11-16 10:57:06,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 10:57:06,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:06,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 10:57:06,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:06,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:06,743 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:06,744 INFO L85 PathProgramCache]: Analyzing trace with hash 985117, now seen corresponding path program 1 times [2022-11-16 10:57:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:06,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503629959] [2022-11-16 10:57:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:06,746 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 [2022-11-16 10:57:06,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:06,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:06,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:06,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:57:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:06,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:06,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:06,905 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:57:06,905 INFO L350 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 12 treesize of output 20 [2022-11-16 10:57:06,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 10:57:06,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:06,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:07,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:07,038 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:07,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503629959] [2022-11-16 10:57:07,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503629959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:07,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:07,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:07,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567119383] [2022-11-16 10:57:07,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:07,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:07,040 INFO L87 Difference]: Start difference. First operand 489 states and 1391 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) [2022-11-16 10:57:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:07,351 INFO L93 Difference]: Finished difference Result 390 states and 1066 transitions. [2022-11-16 10:57:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:07,352 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 [2022-11-16 10:57:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:07,354 INFO L225 Difference]: With dead ends: 390 [2022-11-16 10:57:07,355 INFO L226 Difference]: Without dead ends: 390 [2022-11-16 10:57:07,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:07,356 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:07,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-16 10:57:07,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-16 10:57:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-11-16 10:57:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 269 states have (on average 3.962825278810409) internal successors, (1066), 389 states have internal predecessors, (1066), 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) [2022-11-16 10:57:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1066 transitions. [2022-11-16 10:57:07,369 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1066 transitions. Word has length 3 [2022-11-16 10:57:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:07,369 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 1066 transitions. [2022-11-16 10:57:07,370 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) [2022-11-16 10:57:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1066 transitions. [2022-11-16 10:57:07,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 10:57:07,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:07,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 10:57:07,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:07,582 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash 983900, now seen corresponding path program 1 times [2022-11-16 10:57:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:07,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820103190] [2022-11-16 10:57:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:07,583 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 [2022-11-16 10:57:07,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:07,584 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:07,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:07,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:57:07,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:07,738 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:57:07,738 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:57:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:07,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:08,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:08,054 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:08,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820103190] [2022-11-16 10:57:08,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820103190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:08,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:08,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-16 10:57:08,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892568965] [2022-11-16 10:57:08,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:08,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:57:08,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:08,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:57:08,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:57:08,056 INFO L87 Difference]: Start difference. First operand 390 states and 1066 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-16 10:57:09,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:09,710 INFO L93 Difference]: Finished difference Result 1160 states and 3183 transitions. [2022-11-16 10:57:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:57:09,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-16 10:57:09,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:09,718 INFO L225 Difference]: With dead ends: 1160 [2022-11-16 10:57:09,718 INFO L226 Difference]: Without dead ends: 1160 [2022-11-16 10:57:09,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:57:09,719 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 314 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:09,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 10:57:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2022-11-16 10:57:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 396. [2022-11-16 10:57:09,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 275 states have (on average 3.930909090909091) internal successors, (1081), 395 states have internal predecessors, (1081), 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) [2022-11-16 10:57:09,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1081 transitions. [2022-11-16 10:57:09,738 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1081 transitions. Word has length 3 [2022-11-16 10:57:09,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:09,738 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 1081 transitions. [2022-11-16 10:57:09,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-16 10:57:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1081 transitions. [2022-11-16 10:57:09,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 10:57:09,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:09,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 10:57:09,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:09,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:09,956 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:09,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash 30538904, now seen corresponding path program 1 times [2022-11-16 10:57:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:09,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43092685] [2022-11-16 10:57:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:09,957 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 [2022-11-16 10:57:09,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:09,962 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:09,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 10:57:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:10,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 10:57:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:10,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:10,122 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 10:57:10,122 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 10:57:10,178 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 10:57:10,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:10,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:10,201 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:10,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43092685] [2022-11-16 10:57:10,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43092685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:10,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:10,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:10,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312650644] [2022-11-16 10:57:10,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:10,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:10,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:10,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:10,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:10,202 INFO L87 Difference]: Start difference. First operand 396 states and 1081 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 10:57:10,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:10,417 INFO L93 Difference]: Finished difference Result 400 states and 1090 transitions. [2022-11-16 10:57:10,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:10,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-16 10:57:10,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:10,426 INFO L225 Difference]: With dead ends: 400 [2022-11-16 10:57:10,427 INFO L226 Difference]: Without dead ends: 400 [2022-11-16 10:57:10,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:10,428 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:10,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-16 10:57:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-16 10:57:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-16 10:57:10,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 279 states have (on average 3.9068100358422937) internal successors, (1090), 399 states have internal predecessors, (1090), 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) [2022-11-16 10:57:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1090 transitions. [2022-11-16 10:57:10,441 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1090 transitions. Word has length 4 [2022-11-16 10:57:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:10,441 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 1090 transitions. [2022-11-16 10:57:10,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 10:57:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1090 transitions. [2022-11-16 10:57:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 10:57:10,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:10,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 10:57:10,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-16 10:57:10,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:10,654 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:10,655 INFO L85 PathProgramCache]: Analyzing trace with hash 30509919, now seen corresponding path program 1 times [2022-11-16 10:57:10,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:10,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965696728] [2022-11-16 10:57:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:10,655 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 [2022-11-16 10:57:10,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:10,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:10,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 10:57:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:10,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:10,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:10,807 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 10:57:10,807 INFO L350 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 10:57:10,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 10:57:10,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:10,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:10,885 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965696728] [2022-11-16 10:57:10,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965696728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:10,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:10,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477409831] [2022-11-16 10:57:10,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:10,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:10,887 INFO L87 Difference]: Start difference. First operand 400 states and 1090 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 10:57:11,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:11,087 INFO L93 Difference]: Finished difference Result 400 states and 1089 transitions. [2022-11-16 10:57:11,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:11,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-16 10:57:11,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:11,090 INFO L225 Difference]: With dead ends: 400 [2022-11-16 10:57:11,090 INFO L226 Difference]: Without dead ends: 400 [2022-11-16 10:57:11,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:11,091 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:11,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-16 10:57:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-16 10:57:11,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-11-16 10:57:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 279 states have (on average 3.903225806451613) internal successors, (1089), 399 states have internal predecessors, (1089), 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) [2022-11-16 10:57:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1089 transitions. [2022-11-16 10:57:11,105 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1089 transitions. Word has length 4 [2022-11-16 10:57:11,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:11,106 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 1089 transitions. [2022-11-16 10:57:11,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-16 10:57:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1089 transitions. [2022-11-16 10:57:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 10:57:11,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:11,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 10:57:11,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:11,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:11,318 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:11,318 INFO L85 PathProgramCache]: Analyzing trace with hash 946717147, now seen corresponding path program 1 times [2022-11-16 10:57:11,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:11,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953287386] [2022-11-16 10:57:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:11,319 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 [2022-11-16 10:57:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:11,319 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:11,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:11,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 10:57:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:11,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:11,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:11,495 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:57:11,495 INFO L350 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 12 treesize of output 20 [2022-11-16 10:57:11,505 INFO L350 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 14 treesize of output 12 [2022-11-16 10:57:11,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:11,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:11,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:11,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953287386] [2022-11-16 10:57:11,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953287386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:11,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:11,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912161218] [2022-11-16 10:57:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:11,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:11,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:11,619 INFO L87 Difference]: Start difference. First operand 400 states and 1089 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:11,933 INFO L93 Difference]: Finished difference Result 402 states and 1094 transitions. [2022-11-16 10:57:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 10:57:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:11,937 INFO L225 Difference]: With dead ends: 402 [2022-11-16 10:57:11,937 INFO L226 Difference]: Without dead ends: 402 [2022-11-16 10:57:11,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:11,938 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:11,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 44 Unchecked, 0.3s Time] [2022-11-16 10:57:11,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-16 10:57:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 402. [2022-11-16 10:57:11,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 281 states have (on average 3.893238434163701) internal successors, (1094), 401 states have internal predecessors, (1094), 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) [2022-11-16 10:57:11,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1094 transitions. [2022-11-16 10:57:11,950 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1094 transitions. Word has length 5 [2022-11-16 10:57:11,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:11,951 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 1094 transitions. [2022-11-16 10:57:11,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1094 transitions. [2022-11-16 10:57:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 10:57:11,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:11,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 10:57:11,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:12,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:12,164 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash 946717148, now seen corresponding path program 1 times [2022-11-16 10:57:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:12,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015474352] [2022-11-16 10:57:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:12,165 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 [2022-11-16 10:57:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:12,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:12,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:12,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:12,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:12,282 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-16 10:57:12,283 INFO L350 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-16 10:57:12,336 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 10:57:12,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:12,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:12,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:12,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015474352] [2022-11-16 10:57:12,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015474352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:12,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:12,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:12,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080131412] [2022-11-16 10:57:12,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:12,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:12,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:12,358 INFO L87 Difference]: Start difference. First operand 402 states and 1094 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:12,615 INFO L93 Difference]: Finished difference Result 381 states and 1048 transitions. [2022-11-16 10:57:12,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:12,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 10:57:12,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:12,618 INFO L225 Difference]: With dead ends: 381 [2022-11-16 10:57:12,618 INFO L226 Difference]: Without dead ends: 381 [2022-11-16 10:57:12,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:12,619 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:12,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:57:12,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-16 10:57:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-11-16 10:57:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 274 states have (on average 3.8248175182481754) internal successors, (1048), 380 states have internal predecessors, (1048), 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) [2022-11-16 10:57:12,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 1048 transitions. [2022-11-16 10:57:12,638 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 1048 transitions. Word has length 5 [2022-11-16 10:57:12,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:12,638 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 1048 transitions. [2022-11-16 10:57:12,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:12,639 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 1048 transitions. [2022-11-16 10:57:12,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 10:57:12,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:12,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 10:57:12,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:12,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:12,861 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash 945807797, now seen corresponding path program 1 times [2022-11-16 10:57:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711738998] [2022-11-16 10:57:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:12,862 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 [2022-11-16 10:57:12,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:12,863 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:12,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 10:57:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:13,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:13,045 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-16 10:57:13,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-16 10:57:13,123 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 10:57:13,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:57:13,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:13,159 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:13,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711738998] [2022-11-16 10:57:13,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711738998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:13,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:13,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 10:57:13,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186412572] [2022-11-16 10:57:13,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:13,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:13,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:13,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:13,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:13,160 INFO L87 Difference]: Start difference. First operand 381 states and 1048 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:13,335 INFO L93 Difference]: Finished difference Result 380 states and 1044 transitions. [2022-11-16 10:57:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 10:57:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:13,339 INFO L225 Difference]: With dead ends: 380 [2022-11-16 10:57:13,339 INFO L226 Difference]: Without dead ends: 380 [2022-11-16 10:57:13,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:13,340 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:13,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-16 10:57:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-16 10:57:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 375. [2022-11-16 10:57:13,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 269 states have (on average 3.840148698884758) internal successors, (1033), 374 states have internal predecessors, (1033), 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) [2022-11-16 10:57:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 1033 transitions. [2022-11-16 10:57:13,353 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 1033 transitions. Word has length 5 [2022-11-16 10:57:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:13,353 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 1033 transitions. [2022-11-16 10:57:13,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 1033 transitions. [2022-11-16 10:57:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 10:57:13,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:13,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 10:57:13,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:13,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:13,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:13,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:13,567 INFO L85 PathProgramCache]: Analyzing trace with hash -716863657, now seen corresponding path program 1 times [2022-11-16 10:57:13,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:13,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379706189] [2022-11-16 10:57:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:13,568 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 [2022-11-16 10:57:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:13,569 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:13,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:13,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:57:13,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:13,737 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:57:13,737 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:57:13,765 INFO L350 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 42 treesize of output 38 [2022-11-16 10:57:13,816 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 10:57:13,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:13,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:14,401 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:14,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379706189] [2022-11-16 10:57:14,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379706189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:14,401 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:14,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 7 [2022-11-16 10:57:14,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438532745] [2022-11-16 10:57:14,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:14,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 10:57:14,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 10:57:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:57:14,403 INFO L87 Difference]: Start difference. First operand 375 states and 1033 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:15,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:15,285 INFO L93 Difference]: Finished difference Result 722 states and 2010 transitions. [2022-11-16 10:57:15,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:57:15,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 [2022-11-16 10:57:15,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:15,290 INFO L225 Difference]: With dead ends: 722 [2022-11-16 10:57:15,290 INFO L226 Difference]: Without dead ends: 722 [2022-11-16 10:57:15,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:57:15,291 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 88 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:15,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 196 Unchecked, 0.9s Time] [2022-11-16 10:57:15,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-11-16 10:57:15,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 383. [2022-11-16 10:57:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 282 states have (on average 3.719858156028369) internal successors, (1049), 382 states have internal predecessors, (1049), 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) [2022-11-16 10:57:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1049 transitions. [2022-11-16 10:57:15,306 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1049 transitions. Word has length 6 [2022-11-16 10:57:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:15,306 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 1049 transitions. [2022-11-16 10:57:15,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2022-11-16 10:57:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1049 transitions. [2022-11-16 10:57:15,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 10:57:15,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:15,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 10:57:15,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:15,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:15,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:15,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:15,523 INFO L85 PathProgramCache]: Analyzing trace with hash -716538932, now seen corresponding path program 1 times [2022-11-16 10:57:15,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:15,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570959099] [2022-11-16 10:57:15,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:15,524 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 [2022-11-16 10:57:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:15,524 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:15,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:15,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:15,673 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:57:15,674 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:57:15,683 INFO L350 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 39 treesize of output 37 [2022-11-16 10:57:15,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:15,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:15,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:15,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:15,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570959099] [2022-11-16 10:57:15,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570959099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:15,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:15,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:15,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104186651] [2022-11-16 10:57:15,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:15,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:15,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:15,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:15,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:15,799 INFO L87 Difference]: Start difference. First operand 383 states and 1049 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:16,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:16,107 INFO L93 Difference]: Finished difference Result 384 states and 1050 transitions. [2022-11-16 10:57:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 10:57:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:16,110 INFO L225 Difference]: With dead ends: 384 [2022-11-16 10:57:16,111 INFO L226 Difference]: Without dead ends: 384 [2022-11-16 10:57:16,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:16,112 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:16,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-16 10:57:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-16 10:57:16,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 383. [2022-11-16 10:57:16,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 282 states have (on average 3.719858156028369) internal successors, (1049), 382 states have internal predecessors, (1049), 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) [2022-11-16 10:57:16,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 1049 transitions. [2022-11-16 10:57:16,131 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 1049 transitions. Word has length 6 [2022-11-16 10:57:16,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:16,132 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 1049 transitions. [2022-11-16 10:57:16,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:16,132 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 1049 transitions. [2022-11-16 10:57:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 10:57:16,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:16,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 10:57:16,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:16,347 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:16,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:16,347 INFO L85 PathProgramCache]: Analyzing trace with hash -716540340, now seen corresponding path program 1 times [2022-11-16 10:57:16,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:16,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819311085] [2022-11-16 10:57:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:16,348 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 [2022-11-16 10:57:16,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:16,349 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:16,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:16,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:16,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:16,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:16,503 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:16,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819311085] [2022-11-16 10:57:16,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819311085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:16,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:16,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:16,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139448905] [2022-11-16 10:57:16,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:16,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:16,505 INFO L87 Difference]: Start difference. First operand 383 states and 1049 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-11-16 10:57:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:17,153 INFO L93 Difference]: Finished difference Result 525 states and 1373 transitions. [2022-11-16 10:57:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2022-11-16 10:57:17,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:17,157 INFO L225 Difference]: With dead ends: 525 [2022-11-16 10:57:17,157 INFO L226 Difference]: Without dead ends: 525 [2022-11-16 10:57:17,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:17,158 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:17,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 10:57:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-16 10:57:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 442. [2022-11-16 10:57:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 341 states have (on average 3.592375366568915) internal successors, (1225), 441 states have internal predecessors, (1225), 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) [2022-11-16 10:57:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1225 transitions. [2022-11-16 10:57:17,172 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1225 transitions. Word has length 6 [2022-11-16 10:57:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:17,172 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 1225 transitions. [2022-11-16 10:57:17,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2022-11-16 10:57:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1225 transitions. [2022-11-16 10:57:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 10:57:17,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:17,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 10:57:17,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:17,385 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:17,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash -716540141, now seen corresponding path program 1 times [2022-11-16 10:57:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:17,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878652514] [2022-11-16 10:57:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:17,386 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 [2022-11-16 10:57:17,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:17,387 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:17,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 10:57:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:17,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:17,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:17,547 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:57:17,547 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:57:17,566 INFO L350 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 26 treesize of output 24 [2022-11-16 10:57:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:17,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:17,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:17,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:17,715 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:17,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878652514] [2022-11-16 10:57:17,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878652514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:17,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:17,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:17,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835604178] [2022-11-16 10:57:17,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:17,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:17,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:17,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:17,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:17,717 INFO L87 Difference]: Start difference. First operand 442 states and 1225 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:17,952 INFO L93 Difference]: Finished difference Result 444 states and 1234 transitions. [2022-11-16 10:57:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:17,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 10:57:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:17,955 INFO L225 Difference]: With dead ends: 444 [2022-11-16 10:57:17,955 INFO L226 Difference]: Without dead ends: 444 [2022-11-16 10:57:17,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:17,956 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:17,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-16 10:57:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-16 10:57:17,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-11-16 10:57:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 343 states have (on average 3.597667638483965) internal successors, (1234), 443 states have internal predecessors, (1234), 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) [2022-11-16 10:57:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1234 transitions. [2022-11-16 10:57:17,970 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1234 transitions. Word has length 6 [2022-11-16 10:57:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:17,970 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 1234 transitions. [2022-11-16 10:57:17,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:17,971 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1234 transitions. [2022-11-16 10:57:17,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 10:57:17,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:17,972 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-16 10:57:17,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:18,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:18,183 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash -745657793, now seen corresponding path program 2 times [2022-11-16 10:57:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467245680] [2022-11-16 10:57:18,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:18,184 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 [2022-11-16 10:57:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:18,185 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:18,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-16 10:57:18,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:57:18,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:18,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:57:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:18,347 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:57:18,347 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:57:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:19,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:19,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467245680] [2022-11-16 10:57:19,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1467245680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:19,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:19,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 10:57:19,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088088276] [2022-11-16 10:57:19,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:19,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:57:19,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:19,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:57:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:57:19,305 INFO L87 Difference]: Start difference. First operand 444 states and 1234 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:22,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:57:23,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:57:25,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:57:27,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:57:29,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:57:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:34,598 INFO L93 Difference]: Finished difference Result 3619 states and 10310 transitions. [2022-11-16 10:57:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 10:57:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 10:57:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:34,621 INFO L225 Difference]: With dead ends: 3619 [2022-11-16 10:57:34,621 INFO L226 Difference]: Without dead ends: 3619 [2022-11-16 10:57:34,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-16 10:57:34,624 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1077 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 86 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:34,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 0 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1109 Invalid, 1 Unknown, 0 Unchecked, 13.9s Time] [2022-11-16 10:57:34,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2022-11-16 10:57:34,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 460. [2022-11-16 10:57:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 359 states have (on average 3.5264623955431755) internal successors, (1266), 459 states have internal predecessors, (1266), 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) [2022-11-16 10:57:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1266 transitions. [2022-11-16 10:57:34,678 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1266 transitions. Word has length 6 [2022-11-16 10:57:34,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:34,679 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 1266 transitions. [2022-11-16 10:57:34,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1266 transitions. [2022-11-16 10:57:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 10:57:34,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:34,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:34,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:34,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:34,898 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:34,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:34,898 INFO L85 PathProgramCache]: Analyzing trace with hash -737867947, now seen corresponding path program 1 times [2022-11-16 10:57:34,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:34,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865618361] [2022-11-16 10:57:34,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:34,899 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 [2022-11-16 10:57:34,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:34,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:34,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 10:57:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:35,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:35,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:35,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865618361] [2022-11-16 10:57:35,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865618361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:35,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:35,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:35,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630422200] [2022-11-16 10:57:35,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:35,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:35,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:35,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:35,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:35,009 INFO L87 Difference]: Start difference. First operand 460 states and 1266 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:35,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:35,260 INFO L93 Difference]: Finished difference Result 348 states and 893 transitions. [2022-11-16 10:57:35,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:35,261 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 10:57:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:35,264 INFO L225 Difference]: With dead ends: 348 [2022-11-16 10:57:35,264 INFO L226 Difference]: Without dead ends: 348 [2022-11-16 10:57:35,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:35,265 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:35,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 10:57:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-16 10:57:35,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-11-16 10:57:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 292 states have (on average 3.058219178082192) internal successors, (893), 347 states have internal predecessors, (893), 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) [2022-11-16 10:57:35,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 893 transitions. [2022-11-16 10:57:35,275 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 893 transitions. Word has length 7 [2022-11-16 10:57:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:35,275 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 893 transitions. [2022-11-16 10:57:35,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 893 transitions. [2022-11-16 10:57:35,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 10:57:35,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:35,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:35,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:35,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:35,488 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:35,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash -737905727, now seen corresponding path program 1 times [2022-11-16 10:57:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:35,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [252104578] [2022-11-16 10:57:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:35,489 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 [2022-11-16 10:57:35,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:35,490 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:35,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:35,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:35,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:35,647 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:57:35,647 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:57:35,661 INFO L350 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 26 treesize of output 24 [2022-11-16 10:57:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:35,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:35,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:35,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:35,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [252104578] [2022-11-16 10:57:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [252104578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:35,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:35,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480862076] [2022-11-16 10:57:35,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:35,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:35,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:35,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:35,792 INFO L87 Difference]: Start difference. First operand 348 states and 893 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) [2022-11-16 10:57:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:36,024 INFO L93 Difference]: Finished difference Result 349 states and 894 transitions. [2022-11-16 10:57:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:36,025 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 [2022-11-16 10:57:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:36,027 INFO L225 Difference]: With dead ends: 349 [2022-11-16 10:57:36,027 INFO L226 Difference]: Without dead ends: 349 [2022-11-16 10:57:36,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:36,028 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:36,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-16 10:57:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-16 10:57:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 345. [2022-11-16 10:57:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 289 states have (on average 3.069204152249135) internal successors, (887), 344 states have internal predecessors, (887), 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) [2022-11-16 10:57:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 887 transitions. [2022-11-16 10:57:36,038 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 887 transitions. Word has length 7 [2022-11-16 10:57:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:36,038 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 887 transitions. [2022-11-16 10:57:36,038 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) [2022-11-16 10:57:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 887 transitions. [2022-11-16 10:57:36,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 10:57:36,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:36,039 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:36,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:36,251 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1611429847, now seen corresponding path program 1 times [2022-11-16 10:57:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:36,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686810319] [2022-11-16 10:57:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:36,251 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 [2022-11-16 10:57:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:36,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:36,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 10:57:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:36,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:36,404 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:36,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:36,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686810319] [2022-11-16 10:57:36,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686810319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:36,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:36,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:36,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182877182] [2022-11-16 10:57:36,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:36,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:36,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:36,408 INFO L87 Difference]: Start difference. First operand 345 states and 887 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2022-11-16 10:57:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:36,971 INFO L93 Difference]: Finished difference Result 472 states and 1188 transitions. [2022-11-16 10:57:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2022-11-16 10:57:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:36,973 INFO L225 Difference]: With dead ends: 472 [2022-11-16 10:57:36,973 INFO L226 Difference]: Without dead ends: 472 [2022-11-16 10:57:36,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:57:36,974 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:36,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 10:57:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-16 10:57:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 342. [2022-11-16 10:57:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 286 states have (on average 3.062937062937063) internal successors, (876), 341 states have internal predecessors, (876), 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) [2022-11-16 10:57:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 876 transitions. [2022-11-16 10:57:36,987 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 876 transitions. Word has length 7 [2022-11-16 10:57:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:36,987 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 876 transitions. [2022-11-16 10:57:36,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2022-11-16 10:57:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 876 transitions. [2022-11-16 10:57:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:36,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:36,989 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-16 10:57:37,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:37,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:37,201 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:37,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:37,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1721579561, now seen corresponding path program 2 times [2022-11-16 10:57:37,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:37,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11574576] [2022-11-16 10:57:37,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:37,202 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 [2022-11-16 10:57:37,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:37,203 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:37,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 10:57:37,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:57:37,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:37,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:37,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:37,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:37,372 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:57:37,372 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:57:37,387 INFO L350 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 39 treesize of output 37 [2022-11-16 10:57:37,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:37,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:57:37,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 10:57:37,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:37,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11574576] [2022-11-16 10:57:37,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11574576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:37,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:37,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:37,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7986532] [2022-11-16 10:57:37,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:37,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:37,537 INFO L87 Difference]: Start difference. First operand 342 states and 876 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:37,827 INFO L93 Difference]: Finished difference Result 340 states and 870 transitions. [2022-11-16 10:57:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:37,830 INFO L225 Difference]: With dead ends: 340 [2022-11-16 10:57:37,830 INFO L226 Difference]: Without dead ends: 340 [2022-11-16 10:57:37,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:37,831 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:37,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-11-16 10:57:37,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-16 10:57:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-11-16 10:57:37,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 284 states have (on average 3.063380281690141) internal successors, (870), 339 states have internal predecessors, (870), 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) [2022-11-16 10:57:37,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 870 transitions. [2022-11-16 10:57:37,840 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 870 transitions. Word has length 8 [2022-11-16 10:57:37,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:37,841 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 870 transitions. [2022-11-16 10:57:37,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 870 transitions. [2022-11-16 10:57:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:37,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:37,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:38,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:38,053 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:38,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:38,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1399068410, now seen corresponding path program 1 times [2022-11-16 10:57:38,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:38,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [25839038] [2022-11-16 10:57:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:38,054 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 [2022-11-16 10:57:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:38,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:38,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:38,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:38,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:38,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:38,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [25839038] [2022-11-16 10:57:38,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [25839038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:38,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:38,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422148343] [2022-11-16 10:57:38,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:38,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:38,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:38,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:38,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:38,237 INFO L87 Difference]: Start difference. First operand 340 states and 870 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:38,692 INFO L93 Difference]: Finished difference Result 386 states and 957 transitions. [2022-11-16 10:57:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:38,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:38,695 INFO L225 Difference]: With dead ends: 386 [2022-11-16 10:57:38,695 INFO L226 Difference]: Without dead ends: 386 [2022-11-16 10:57:38,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:38,696 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:38,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 3 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 10:57:38,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-16 10:57:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 364. [2022-11-16 10:57:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 308 states have (on average 3.022727272727273) internal successors, (931), 363 states have internal predecessors, (931), 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) [2022-11-16 10:57:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 931 transitions. [2022-11-16 10:57:38,706 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 931 transitions. Word has length 8 [2022-11-16 10:57:38,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:38,706 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 931 transitions. [2022-11-16 10:57:38,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 931 transitions. [2022-11-16 10:57:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:38,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:38,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:38,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:38,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:38,915 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1575258643, now seen corresponding path program 1 times [2022-11-16 10:57:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:38,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809044013] [2022-11-16 10:57:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:38,916 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 [2022-11-16 10:57:38,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:38,917 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:38,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 10:57:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 10:57:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:39,115 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:57:39,115 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:57:39,156 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 10:57:39,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-16 10:57:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:57:39,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:39,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809044013] [2022-11-16 10:57:39,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809044013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:39,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:39,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:57:39,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835781626] [2022-11-16 10:57:39,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:39,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:39,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:39,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:39,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:39,178 INFO L87 Difference]: Start difference. First operand 364 states and 931 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:39,427 INFO L93 Difference]: Finished difference Result 298 states and 761 transitions. [2022-11-16 10:57:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:57:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:39,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:39,429 INFO L225 Difference]: With dead ends: 298 [2022-11-16 10:57:39,429 INFO L226 Difference]: Without dead ends: 298 [2022-11-16 10:57:39,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:39,430 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:39,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 10:57:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-16 10:57:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-11-16 10:57:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 261 states have (on average 2.9157088122605366) internal successors, (761), 297 states have internal predecessors, (761), 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) [2022-11-16 10:57:39,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 761 transitions. [2022-11-16 10:57:39,439 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 761 transitions. Word has length 8 [2022-11-16 10:57:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:39,439 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 761 transitions. [2022-11-16 10:57:39,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-16 10:57:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 761 transitions. [2022-11-16 10:57:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:39,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:39,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:39,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-16 10:57:39,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:39,652 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:39,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1575258644, now seen corresponding path program 1 times [2022-11-16 10:57:39,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686627775] [2022-11-16 10:57:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:39,653 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 [2022-11-16 10:57:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:39,654 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 10:57:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:39,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:57:39,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:39,883 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:57:39,884 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:57:39,951 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:57:39,952 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:57:40,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:40,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:57:40,090 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:57:40,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:57:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:40,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:40,762 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:40,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686627775] [2022-11-16 10:57:40,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686627775] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:40,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:40,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 10:57:40,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650764357] [2022-11-16 10:57:40,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:40,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 10:57:40,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 10:57:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:57:40,764 INFO L87 Difference]: Start difference. First operand 298 states and 761 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-16 10:57:41,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:41,337 INFO L93 Difference]: Finished difference Result 477 states and 1260 transitions. [2022-11-16 10:57:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 10:57:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:41,341 INFO L225 Difference]: With dead ends: 477 [2022-11-16 10:57:41,341 INFO L226 Difference]: Without dead ends: 477 [2022-11-16 10:57:41,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:57:41,342 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:41,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 177 Unchecked, 0.6s Time] [2022-11-16 10:57:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-11-16 10:57:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 343. [2022-11-16 10:57:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 306 states have (on average 2.980392156862745) internal successors, (912), 342 states have internal predecessors, (912), 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) [2022-11-16 10:57:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 912 transitions. [2022-11-16 10:57:41,361 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 912 transitions. Word has length 8 [2022-11-16 10:57:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:41,361 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 912 transitions. [2022-11-16 10:57:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 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) [2022-11-16 10:57:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 912 transitions. [2022-11-16 10:57:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:41,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:41,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:41,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:41,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:41,575 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1575258794, now seen corresponding path program 1 times [2022-11-16 10:57:41,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975360783] [2022-11-16 10:57:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:41,575 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 [2022-11-16 10:57:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:41,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:41,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:57:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:41,688 INFO L350 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 [2022-11-16 10:57:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:57:41,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:41,711 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975360783] [2022-11-16 10:57:41,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975360783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:41,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:41,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:41,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591025387] [2022-11-16 10:57:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:41,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:57:41,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:57:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:57:41,712 INFO L87 Difference]: Start difference. First operand 343 states and 912 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:41,956 INFO L93 Difference]: Finished difference Result 285 states and 748 transitions. [2022-11-16 10:57:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:57:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:41,958 INFO L225 Difference]: With dead ends: 285 [2022-11-16 10:57:41,958 INFO L226 Difference]: Without dead ends: 285 [2022-11-16 10:57:41,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:41,959 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:41,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 10:57:41,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-16 10:57:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-11-16 10:57:41,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 263 states have (on average 2.844106463878327) internal successors, (748), 284 states have internal predecessors, (748), 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) [2022-11-16 10:57:41,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 748 transitions. [2022-11-16 10:57:41,967 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 748 transitions. Word has length 8 [2022-11-16 10:57:41,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:41,968 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 748 transitions. [2022-11-16 10:57:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:41,968 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 748 transitions. [2022-11-16 10:57:41,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:57:41,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:41,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:41,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:42,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:42,179 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1575258795, now seen corresponding path program 1 times [2022-11-16 10:57:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:42,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344774365] [2022-11-16 10:57:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:42,180 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:42,181 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:57:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:42,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:42,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:42,588 INFO L350 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 25 treesize of output 21 [2022-11-16 10:57:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:42,661 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:42,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344774365] [2022-11-16 10:57:42,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344774365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:42,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:42,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 10:57:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572958698] [2022-11-16 10:57:42,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 10:57:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 10:57:42,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:57:42,663 INFO L87 Difference]: Start difference. First operand 285 states and 748 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:44,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:44,672 INFO L93 Difference]: Finished difference Result 766 states and 1945 transitions. [2022-11-16 10:57:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 10:57:44,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:57:44,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:44,676 INFO L225 Difference]: With dead ends: 766 [2022-11-16 10:57:44,676 INFO L226 Difference]: Without dead ends: 766 [2022-11-16 10:57:44,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2022-11-16 10:57:44,677 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 381 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:44,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 10:57:44,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2022-11-16 10:57:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 285. [2022-11-16 10:57:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 267 states have (on average 2.8689138576779025) internal successors, (766), 284 states have internal predecessors, (766), 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) [2022-11-16 10:57:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 766 transitions. [2022-11-16 10:57:44,689 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 766 transitions. Word has length 8 [2022-11-16 10:57:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:44,689 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 766 transitions. [2022-11-16 10:57:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 766 transitions. [2022-11-16 10:57:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 10:57:44,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:44,690 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:44,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:44,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:44,902 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:44,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:44,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1829358256, now seen corresponding path program 1 times [2022-11-16 10:57:44,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465684147] [2022-11-16 10:57:44,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:44,903 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 [2022-11-16 10:57:44,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:44,904 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:44,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-16 10:57:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 10:57:45,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:45,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:45,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:45,121 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:57:45,121 INFO L350 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 12 treesize of output 20 [2022-11-16 10:57:45,126 INFO L350 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 14 treesize of output 12 [2022-11-16 10:57:45,174 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 10:57:45,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:57:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:45,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:57:46,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:46,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465684147] [2022-11-16 10:57:46,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465684147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:46,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:46,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-16 10:57:46,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109075285] [2022-11-16 10:57:46,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 10:57:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:46,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 10:57:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-11-16 10:57:46,615 INFO L87 Difference]: Start difference. First operand 285 states and 766 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:48,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:48,273 INFO L93 Difference]: Finished difference Result 714 states and 1961 transitions. [2022-11-16 10:57:48,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 10:57:48,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 10:57:48,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:48,276 INFO L225 Difference]: With dead ends: 714 [2022-11-16 10:57:48,276 INFO L226 Difference]: Without dead ends: 714 [2022-11-16 10:57:48,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-11-16 10:57:48,277 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 248 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:48,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 0 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 216 Invalid, 0 Unknown, 396 Unchecked, 1.0s Time] [2022-11-16 10:57:48,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-16 10:57:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 285. [2022-11-16 10:57:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 267 states have (on average 2.8689138576779025) internal successors, (766), 284 states have internal predecessors, (766), 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) [2022-11-16 10:57:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 766 transitions. [2022-11-16 10:57:48,288 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 766 transitions. Word has length 9 [2022-11-16 10:57:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:48,288 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 766 transitions. [2022-11-16 10:57:48,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:48,288 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 766 transitions. [2022-11-16 10:57:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 10:57:48,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:48,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:48,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:48,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:48,502 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:48,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1588378553, now seen corresponding path program 1 times [2022-11-16 10:57:48,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:48,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747479849] [2022-11-16 10:57:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:48,502 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 [2022-11-16 10:57:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:48,503 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:48,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 10:57:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:48,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:57:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:57:48,675 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:48,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:48,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747479849] [2022-11-16 10:57:48,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747479849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:48,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:48,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:48,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321772229] [2022-11-16 10:57:48,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:48,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 10:57:48,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:48,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 10:57:48,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:57:48,677 INFO L87 Difference]: Start difference. First operand 285 states and 766 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:49,146 INFO L93 Difference]: Finished difference Result 428 states and 1078 transitions. [2022-11-16 10:57:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-16 10:57:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:49,149 INFO L225 Difference]: With dead ends: 428 [2022-11-16 10:57:49,149 INFO L226 Difference]: Without dead ends: 428 [2022-11-16 10:57:49,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:57:49,149 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:49,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 10:57:49,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-16 10:57:49,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 305. [2022-11-16 10:57:49,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 287 states have (on average 2.9198606271777003) internal successors, (838), 304 states have internal predecessors, (838), 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) [2022-11-16 10:57:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 838 transitions. [2022-11-16 10:57:49,159 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 838 transitions. Word has length 9 [2022-11-16 10:57:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:49,159 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 838 transitions. [2022-11-16 10:57:49,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 838 transitions. [2022-11-16 10:57:49,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 10:57:49,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:49,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:49,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-16 10:57:49,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:49,375 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:49,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1900541859, now seen corresponding path program 1 times [2022-11-16 10:57:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:49,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1041457548] [2022-11-16 10:57:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:49,376 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 [2022-11-16 10:57:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:49,377 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:49,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:57:49,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:49,530 INFO L350 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 [2022-11-16 10:57:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:49,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:49,671 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:49,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1041457548] [2022-11-16 10:57:49,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1041457548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:49,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:49,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:49,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563557136] [2022-11-16 10:57:49,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:49,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:49,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:49,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:49,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:49,673 INFO L87 Difference]: Start difference. First operand 305 states and 838 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:49,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:49,918 INFO L93 Difference]: Finished difference Result 311 states and 860 transitions. [2022-11-16 10:57:49,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:57:49,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-16 10:57:49,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:49,921 INFO L225 Difference]: With dead ends: 311 [2022-11-16 10:57:49,921 INFO L226 Difference]: Without dead ends: 311 [2022-11-16 10:57:49,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:57:49,922 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:49,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 10:57:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-16 10:57:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 306. [2022-11-16 10:57:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 288 states have (on average 2.9305555555555554) internal successors, (844), 305 states have internal predecessors, (844), 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) [2022-11-16 10:57:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 844 transitions. [2022-11-16 10:57:49,930 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 844 transitions. Word has length 9 [2022-11-16 10:57:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:49,930 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 844 transitions. [2022-11-16 10:57:49,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:49,931 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 844 transitions. [2022-11-16 10:57:49,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 10:57:49,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:49,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:49,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:50,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:50,135 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:50,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:50,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1900541823, now seen corresponding path program 1 times [2022-11-16 10:57:50,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:50,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1207651911] [2022-11-16 10:57:50,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:50,136 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 [2022-11-16 10:57:50,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:50,136 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:50,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 10:57:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:57:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:50,252 INFO L350 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 [2022-11-16 10:57:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:50,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:50,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:50,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1207651911] [2022-11-16 10:57:50,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1207651911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:50,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:50,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:50,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528412747] [2022-11-16 10:57:50,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:50,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:50,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:50,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:50,365 INFO L87 Difference]: Start difference. First operand 306 states and 844 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:50,823 INFO L93 Difference]: Finished difference Result 394 states and 1085 transitions. [2022-11-16 10:57:50,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:57:50,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-16 10:57:50,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:50,831 INFO L225 Difference]: With dead ends: 394 [2022-11-16 10:57:50,831 INFO L226 Difference]: Without dead ends: 394 [2022-11-16 10:57:50,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:57:50,832 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:50,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 10:57:50,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-16 10:57:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 333. [2022-11-16 10:57:50,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 315 states have (on average 3.0793650793650795) internal successors, (970), 332 states have internal predecessors, (970), 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) [2022-11-16 10:57:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 970 transitions. [2022-11-16 10:57:50,841 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 970 transitions. Word has length 9 [2022-11-16 10:57:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:50,842 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 970 transitions. [2022-11-16 10:57:50,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-16 10:57:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 970 transitions. [2022-11-16 10:57:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:50,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:50,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:50,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:51,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:51,054 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:51,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:51,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1996498701, now seen corresponding path program 1 times [2022-11-16 10:57:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:51,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213944405] [2022-11-16 10:57:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:51,055 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 [2022-11-16 10:57:51,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:51,056 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:51,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-16 10:57:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:51,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:57:51,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:51,340 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:57:51,340 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:57:51,411 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:57:51,411 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:57:51,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:57:51,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:57:51,516 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:57:51,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:57:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:51,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:54,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:54,209 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:54,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213944405] [2022-11-16 10:57:54,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213944405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:54,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:54,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 10:57:54,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443933213] [2022-11-16 10:57:54,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:54,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 10:57:54,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:54,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 10:57:54,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:57:54,211 INFO L87 Difference]: Start difference. First operand 333 states and 970 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-11-16 10:57:54,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:54,783 INFO L93 Difference]: Finished difference Result 346 states and 1016 transitions. [2022-11-16 10:57:54,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 10:57:54,784 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 [2022-11-16 10:57:54,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:54,786 INFO L225 Difference]: With dead ends: 346 [2022-11-16 10:57:54,786 INFO L226 Difference]: Without dead ends: 346 [2022-11-16 10:57:54,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:57:54,787 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:54,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 55 Unchecked, 0.6s Time] [2022-11-16 10:57:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-16 10:57:54,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 336. [2022-11-16 10:57:54,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 318 states have (on average 3.088050314465409) internal successors, (982), 335 states have internal predecessors, (982), 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) [2022-11-16 10:57:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 982 transitions. [2022-11-16 10:57:54,793 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 982 transitions. Word has length 10 [2022-11-16 10:57:54,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:54,793 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 982 transitions. [2022-11-16 10:57:54,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-11-16 10:57:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 982 transitions. [2022-11-16 10:57:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:54,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:54,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:54,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:54,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:54,996 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1995095520, now seen corresponding path program 1 times [2022-11-16 10:57:54,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:54,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537641267] [2022-11-16 10:57:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:54,997 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 [2022-11-16 10:57:54,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:54,998 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:54,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:55,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 10:57:55,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:55,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:55,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:57:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:55,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537641267] [2022-11-16 10:57:55,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537641267] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:57:55,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:57:55,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 10:57:55,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698947038] [2022-11-16 10:57:55,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:57:55,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:57:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:57:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:57:55,458 INFO L87 Difference]: Start difference. First operand 336 states and 982 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:57:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:56,989 INFO L93 Difference]: Finished difference Result 590 states and 1624 transitions. [2022-11-16 10:57:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 10:57:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 [2022-11-16 10:57:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:56,991 INFO L225 Difference]: With dead ends: 590 [2022-11-16 10:57:56,991 INFO L226 Difference]: Without dead ends: 590 [2022-11-16 10:57:56,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 10:57:56,992 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 136 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:56,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 2 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 10:57:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-16 10:57:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 385. [2022-11-16 10:57:57,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 367 states have (on average 3.1852861035422344) internal successors, (1169), 384 states have internal predecessors, (1169), 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) [2022-11-16 10:57:57,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1169 transitions. [2022-11-16 10:57:57,008 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1169 transitions. Word has length 10 [2022-11-16 10:57:57,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:57,009 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 1169 transitions. [2022-11-16 10:57:57,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:57:57,009 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1169 transitions. [2022-11-16 10:57:57,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:57,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:57,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:57,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:57,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:57,222 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:57,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1214520712, now seen corresponding path program 1 times [2022-11-16 10:57:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:57,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408174104] [2022-11-16 10:57:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:57,222 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 [2022-11-16 10:57:57,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:57,223 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:57,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 10:57:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:57,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 10:57:57,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:57,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:57,348 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:57,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408174104] [2022-11-16 10:57:57,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408174104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:57,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:57,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:57,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397509042] [2022-11-16 10:57:57,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:57,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:57,350 INFO L87 Difference]: Start difference. First operand 385 states and 1169 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:57,710 INFO L93 Difference]: Finished difference Result 458 states and 1307 transitions. [2022-11-16 10:57:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:57,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 10:57:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:57,712 INFO L225 Difference]: With dead ends: 458 [2022-11-16 10:57:57,712 INFO L226 Difference]: Without dead ends: 458 [2022-11-16 10:57:57,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:57,713 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:57,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 10:57:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-11-16 10:57:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 394. [2022-11-16 10:57:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 376 states have (on average 3.146276595744681) internal successors, (1183), 393 states have internal predecessors, (1183), 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) [2022-11-16 10:57:57,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1183 transitions. [2022-11-16 10:57:57,724 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1183 transitions. Word has length 10 [2022-11-16 10:57:57,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:57,724 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 1183 transitions. [2022-11-16 10:57:57,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:57,724 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1183 transitions. [2022-11-16 10:57:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:57,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:57,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:57,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:57,937 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1212762082, now seen corresponding path program 1 times [2022-11-16 10:57:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:57,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [47856788] [2022-11-16 10:57:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:57:57,938 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 [2022-11-16 10:57:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:57,939 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:57,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-16 10:57:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:57:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:57:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:58,095 INFO L350 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 [2022-11-16 10:57:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:58,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:58,248 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:58,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [47856788] [2022-11-16 10:57:58,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [47856788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:58,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:58,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:58,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089269822] [2022-11-16 10:57:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:58,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:58,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:58,249 INFO L87 Difference]: Start difference. First operand 394 states and 1183 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:57:58,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:58,497 INFO L93 Difference]: Finished difference Result 403 states and 1213 transitions. [2022-11-16 10:57:58,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:57:58,498 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-11-16 10:57:58,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:58,499 INFO L225 Difference]: With dead ends: 403 [2022-11-16 10:57:58,499 INFO L226 Difference]: Without dead ends: 403 [2022-11-16 10:57:58,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:57:58,500 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:58,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-16 10:57:58,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-16 10:57:58,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 395. [2022-11-16 10:57:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 377 states have (on average 3.1485411140583555) internal successors, (1187), 394 states have internal predecessors, (1187), 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) [2022-11-16 10:57:58,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1187 transitions. [2022-11-16 10:57:58,512 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1187 transitions. Word has length 10 [2022-11-16 10:57:58,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:58,512 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1187 transitions. [2022-11-16 10:57:58,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:57:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1187 transitions. [2022-11-16 10:57:58,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:58,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:58,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:58,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-16 10:57:58,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:58,725 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1212741622, now seen corresponding path program 2 times [2022-11-16 10:57:58,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:58,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [716286142] [2022-11-16 10:57:58,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:58,725 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 [2022-11-16 10:57:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:58,727 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:58,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:58,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:57:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 10:57:58,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:58,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:58,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [716286142] [2022-11-16 10:57:58,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [716286142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:58,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:58,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:57:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363332164] [2022-11-16 10:57:58,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:58,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:57:58,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:57:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:58,855 INFO L87 Difference]: Start difference. First operand 395 states and 1187 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:59,132 INFO L93 Difference]: Finished difference Result 402 states and 1120 transitions. [2022-11-16 10:57:59,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:57:59,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 10:57:59,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:59,134 INFO L225 Difference]: With dead ends: 402 [2022-11-16 10:57:59,134 INFO L226 Difference]: Without dead ends: 402 [2022-11-16 10:57:59,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:57:59,135 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:59,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:57:59,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-16 10:57:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2022-11-16 10:57:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 377 states have (on average 2.957559681697613) internal successors, (1115), 394 states have internal predecessors, (1115), 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) [2022-11-16 10:57:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1115 transitions. [2022-11-16 10:57:59,144 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1115 transitions. Word has length 10 [2022-11-16 10:57:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:59,144 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 1115 transitions. [2022-11-16 10:57:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:57:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1115 transitions. [2022-11-16 10:57:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:59,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:59,145 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:59,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:59,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:57:59,357 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:57:59,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:57:59,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1212743482, now seen corresponding path program 2 times [2022-11-16 10:57:59,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:57:59,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144605785] [2022-11-16 10:57:59,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:57:59,358 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 [2022-11-16 10:57:59,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:57:59,359 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:57:59,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:57:59,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:57:59,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:57:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:57:59,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:57:59,502 INFO L350 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 [2022-11-16 10:57:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:57:59,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:57:59,644 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:57:59,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144605785] [2022-11-16 10:57:59,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144605785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:57:59,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:57:59,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:57:59,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128991351] [2022-11-16 10:57:59,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:57:59,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:57:59,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:57:59,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:57:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:57:59,645 INFO L87 Difference]: Start difference. First operand 395 states and 1115 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:57:59,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:57:59,879 INFO L93 Difference]: Finished difference Result 401 states and 1131 transitions. [2022-11-16 10:57:59,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:57:59,879 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-11-16 10:57:59,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:57:59,881 INFO L225 Difference]: With dead ends: 401 [2022-11-16 10:57:59,881 INFO L226 Difference]: Without dead ends: 401 [2022-11-16 10:57:59,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:57:59,882 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:57:59,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-16 10:57:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-16 10:57:59,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 394. [2022-11-16 10:57:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 376 states have (on average 2.9547872340425534) internal successors, (1111), 393 states have internal predecessors, (1111), 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) [2022-11-16 10:57:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1111 transitions. [2022-11-16 10:57:59,890 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1111 transitions. Word has length 10 [2022-11-16 10:57:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:57:59,891 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 1111 transitions. [2022-11-16 10:57:59,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:57:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1111 transitions. [2022-11-16 10:57:59,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:57:59,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:57:59,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:57:59,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:00,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:00,103 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1212740444, now seen corresponding path program 1 times [2022-11-16 10:58:00,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [82853002] [2022-11-16 10:58:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:00,104 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 [2022-11-16 10:58:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:00,105 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:00,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 10:58:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:00,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 10:58:00,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:00,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:00,580 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:00,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [82853002] [2022-11-16 10:58:00,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [82853002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:00,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:00,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 10:58:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661459719] [2022-11-16 10:58:00,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:58:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:58:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:58:00,582 INFO L87 Difference]: Start difference. First operand 394 states and 1111 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:58:01,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:01,891 INFO L93 Difference]: Finished difference Result 528 states and 1309 transitions. [2022-11-16 10:58:01,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 10:58:01,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 [2022-11-16 10:58:01,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:01,893 INFO L225 Difference]: With dead ends: 528 [2022-11-16 10:58:01,893 INFO L226 Difference]: Without dead ends: 528 [2022-11-16 10:58:01,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-16 10:58:01,894 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 163 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:01,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 15 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 10:58:01,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-11-16 10:58:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 427. [2022-11-16 10:58:01,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 409 states have (on average 2.8899755501222493) internal successors, (1182), 426 states have internal predecessors, (1182), 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) [2022-11-16 10:58:01,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1182 transitions. [2022-11-16 10:58:01,910 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1182 transitions. Word has length 10 [2022-11-16 10:58:01,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:01,910 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 1182 transitions. [2022-11-16 10:58:01,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:58:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1182 transitions. [2022-11-16 10:58:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:58:01,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:01,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:01,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-16 10:58:02,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:02,123 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1212742831, now seen corresponding path program 1 times [2022-11-16 10:58:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [232273313] [2022-11-16 10:58:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:02,123 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 [2022-11-16 10:58:02,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:02,124 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:02,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 10:58:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:02,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:58:02,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:02,312 INFO L350 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 [2022-11-16 10:58:02,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:02,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:02,449 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:02,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [232273313] [2022-11-16 10:58:02,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [232273313] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:02,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:02,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:02,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043820783] [2022-11-16 10:58:02,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:02,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:02,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:02,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:02,451 INFO L87 Difference]: Start difference. First operand 427 states and 1182 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:58:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:02,693 INFO L93 Difference]: Finished difference Result 435 states and 1208 transitions. [2022-11-16 10:58:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:58:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-11-16 10:58:02,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:02,695 INFO L225 Difference]: With dead ends: 435 [2022-11-16 10:58:02,695 INFO L226 Difference]: Without dead ends: 435 [2022-11-16 10:58:02,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:58:02,696 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:02,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 38 Unchecked, 0.2s Time] [2022-11-16 10:58:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-16 10:58:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 429. [2022-11-16 10:58:02,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 411 states have (on average 2.895377128953771) internal successors, (1190), 428 states have internal predecessors, (1190), 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) [2022-11-16 10:58:02,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1190 transitions. [2022-11-16 10:58:02,706 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1190 transitions. Word has length 10 [2022-11-16 10:58:02,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:02,706 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 1190 transitions. [2022-11-16 10:58:02,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:58:02,707 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1190 transitions. [2022-11-16 10:58:02,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:58:02,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:02,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:02,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:02,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:02,919 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:02,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1212741901, now seen corresponding path program 2 times [2022-11-16 10:58:02,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:02,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675960139] [2022-11-16 10:58:02,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:58:02,920 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 [2022-11-16 10:58:02,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:02,920 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:02,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:03,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:58:03,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:03,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 10:58:03,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:03,083 INFO L350 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 [2022-11-16 10:58:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:03,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:03,213 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:03,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675960139] [2022-11-16 10:58:03,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675960139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:03,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:03,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 10:58:03,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697617319] [2022-11-16 10:58:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:03,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:03,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:03,215 INFO L87 Difference]: Start difference. First operand 429 states and 1190 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:58:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:03,443 INFO L93 Difference]: Finished difference Result 443 states and 1228 transitions. [2022-11-16 10:58:03,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:58:03,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 [2022-11-16 10:58:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:03,445 INFO L225 Difference]: With dead ends: 443 [2022-11-16 10:58:03,445 INFO L226 Difference]: Without dead ends: 443 [2022-11-16 10:58:03,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:58:03,446 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:03,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-16 10:58:03,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-16 10:58:03,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 431. [2022-11-16 10:58:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 413 states have (on average 2.8861985472154963) internal successors, (1192), 430 states have internal predecessors, (1192), 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) [2022-11-16 10:58:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1192 transitions. [2022-11-16 10:58:03,456 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1192 transitions. Word has length 10 [2022-11-16 10:58:03,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:03,456 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 1192 transitions. [2022-11-16 10:58:03,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-16 10:58:03,457 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1192 transitions. [2022-11-16 10:58:03,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 10:58:03,457 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:03,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:03,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:03,663 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 797132385, now seen corresponding path program 1 times [2022-11-16 10:58:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:03,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2113952404] [2022-11-16 10:58:03,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:03,663 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 [2022-11-16 10:58:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:03,664 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:03,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:03,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:03,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 10:58:03,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:03,955 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:58:03,956 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:58:04,025 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:58:04,025 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:58:04,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:58:04,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 10:58:04,176 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:58:04,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:58:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:04,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:05,245 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:05,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2113952404] [2022-11-16 10:58:05,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2113952404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:05,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:05,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 10:58:05,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078723101] [2022-11-16 10:58:05,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:05,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:58:05,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:05,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:58:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:58:05,247 INFO L87 Difference]: Start difference. First operand 431 states and 1192 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:58:06,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:06,399 INFO L93 Difference]: Finished difference Result 536 states and 1457 transitions. [2022-11-16 10:58:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 10:58:06,400 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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 [2022-11-16 10:58:06,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:06,402 INFO L225 Difference]: With dead ends: 536 [2022-11-16 10:58:06,402 INFO L226 Difference]: Without dead ends: 536 [2022-11-16 10:58:06,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-11-16 10:58:06,402 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:06,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 245 Unchecked, 0.8s Time] [2022-11-16 10:58:06,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-16 10:58:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 420. [2022-11-16 10:58:06,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 406 states have (on average 2.8251231527093594) internal successors, (1147), 419 states have internal predecessors, (1147), 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) [2022-11-16 10:58:06,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1147 transitions. [2022-11-16 10:58:06,412 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1147 transitions. Word has length 10 [2022-11-16 10:58:06,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:06,412 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 1147 transitions. [2022-11-16 10:58:06,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 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) [2022-11-16 10:58:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1147 transitions. [2022-11-16 10:58:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:06,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:06,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:06,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:06,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:06,626 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:06,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1761900020, now seen corresponding path program 1 times [2022-11-16 10:58:06,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1690882116] [2022-11-16 10:58:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:06,627 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 [2022-11-16 10:58:06,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:06,628 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:06,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Waiting until timeout for monitored process [2022-11-16 10:58:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:06,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 10:58:06,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:06,908 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:58:06,909 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:58:06,975 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:58:06,975 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:58:07,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:58:07,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:58:07,085 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:58:07,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:58:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:07,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:09,768 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:09,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1690882116] [2022-11-16 10:58:09,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1690882116] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:09,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:09,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-16 10:58:09,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608485204] [2022-11-16 10:58:09,769 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:09,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 10:58:09,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:09,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 10:58:09,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:58:09,769 INFO L87 Difference]: Start difference. First operand 420 states and 1147 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-16 10:58:09,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:09,935 INFO L93 Difference]: Finished difference Result 431 states and 1183 transitions. [2022-11-16 10:58:09,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 10:58:09,936 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 [2022-11-16 10:58:09,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:09,937 INFO L225 Difference]: With dead ends: 431 [2022-11-16 10:58:09,937 INFO L226 Difference]: Without dead ends: 431 [2022-11-16 10:58:09,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:58:09,939 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:09,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-11-16 10:58:09,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-16 10:58:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 423. [2022-11-16 10:58:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 409 states have (on average 2.8288508557457215) internal successors, (1157), 422 states have internal predecessors, (1157), 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) [2022-11-16 10:58:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1157 transitions. [2022-11-16 10:58:09,956 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1157 transitions. Word has length 11 [2022-11-16 10:58:09,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:09,956 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 1157 transitions. [2022-11-16 10:58:09,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2022-11-16 10:58:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1157 transitions. [2022-11-16 10:58:09,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:09,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:09,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:09,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:10,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:10,175 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1761918620, now seen corresponding path program 2 times [2022-11-16 10:58:10,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:10,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1104638002] [2022-11-16 10:58:10,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:58:10,176 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 [2022-11-16 10:58:10,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:10,179 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:10,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-16 10:58:10,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:58:10,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 10:58:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:10,404 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:58:10,405 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:58:10,472 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:58:10,473 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:58:10,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:58:10,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:58:10,541 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:58:10,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:58:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:58:10,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:10,651 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:10,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1104638002] [2022-11-16 10:58:10,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1104638002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:10,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:10,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:10,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085230503] [2022-11-16 10:58:10,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:10,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:10,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:10,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:10,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:10,652 INFO L87 Difference]: Start difference. First operand 423 states and 1157 transitions. Second operand has 5 states, 4 states have (on average 2.75) 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) [2022-11-16 10:58:11,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:11,074 INFO L93 Difference]: Finished difference Result 456 states and 1174 transitions. [2022-11-16 10:58:11,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:58:11,075 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) 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 [2022-11-16 10:58:11,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:11,076 INFO L225 Difference]: With dead ends: 456 [2022-11-16 10:58:11,076 INFO L226 Difference]: Without dead ends: 456 [2022-11-16 10:58:11,077 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 [2022-11-16 10:58:11,077 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:11,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 10:58:11,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-11-16 10:58:11,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 388. [2022-11-16 10:58:11,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 374 states have (on average 2.729946524064171) internal successors, (1021), 387 states have internal predecessors, (1021), 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) [2022-11-16 10:58:11,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1021 transitions. [2022-11-16 10:58:11,086 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1021 transitions. Word has length 11 [2022-11-16 10:58:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:11,087 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 1021 transitions. [2022-11-16 10:58:11,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) 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) [2022-11-16 10:58:11,087 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1021 transitions. [2022-11-16 10:58:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:11,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:11,088 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:11,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2022-11-16 10:58:11,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:11,300 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:11,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:11,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1058864624, now seen corresponding path program 1 times [2022-11-16 10:58:11,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:11,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842743665] [2022-11-16 10:58:11,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:11,300 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 [2022-11-16 10:58:11,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:11,302 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:11,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:11,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:11,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 10:58:11,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:11,612 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:58:11,612 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:58:11,681 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:58:11,681 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:58:11,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:58:11,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-16 10:58:11,846 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:58:11,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:58:11,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:11,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:14,816 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:14,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842743665] [2022-11-16 10:58:14,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842743665] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:14,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:14,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-16 10:58:14,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590506846] [2022-11-16 10:58:14,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:14,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:58:14,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:14,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:58:14,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:58:14,818 INFO L87 Difference]: Start difference. First operand 388 states and 1021 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-16 10:58:18,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:18,254 INFO L93 Difference]: Finished difference Result 1074 states and 2683 transitions. [2022-11-16 10:58:18,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 10:58:18,255 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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 [2022-11-16 10:58:18,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:18,258 INFO L225 Difference]: With dead ends: 1074 [2022-11-16 10:58:18,258 INFO L226 Difference]: Without dead ends: 1074 [2022-11-16 10:58:18,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-16 10:58:18,259 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 508 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:18,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 611 Invalid, 0 Unknown, 508 Unchecked, 2.3s Time] [2022-11-16 10:58:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-11-16 10:58:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 419. [2022-11-16 10:58:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 405 states have (on average 2.780246913580247) internal successors, (1126), 418 states have internal predecessors, (1126), 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) [2022-11-16 10:58:18,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1126 transitions. [2022-11-16 10:58:18,283 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1126 transitions. Word has length 11 [2022-11-16 10:58:18,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:18,284 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 1126 transitions. [2022-11-16 10:58:18,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 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) [2022-11-16 10:58:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1126 transitions. [2022-11-16 10:58:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:18,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:18,285 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:18,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:18,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:18,498 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:18,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:18,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1060267715, now seen corresponding path program 2 times [2022-11-16 10:58:18,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:18,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874295849] [2022-11-16 10:58:18,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:58:18,498 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 [2022-11-16 10:58:18,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:18,499 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:18,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:18,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:58:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:18,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:58:18,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:18,744 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 10:58:18,745 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-16 10:58:18,802 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:58:18,802 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:58:18,877 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:58:18,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:58:18,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:58:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:19,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:19,952 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874295849] [2022-11-16 10:58:19,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874295849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:19,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:19,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-16 10:58:19,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374697709] [2022-11-16 10:58:19,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:19,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 10:58:19,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 10:58:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-16 10:58:19,954 INFO L87 Difference]: Start difference. First operand 419 states and 1126 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-11-16 10:58:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:22,255 INFO L93 Difference]: Finished difference Result 787 states and 1879 transitions. [2022-11-16 10:58:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 10:58:22,256 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 [2022-11-16 10:58:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:22,258 INFO L225 Difference]: With dead ends: 787 [2022-11-16 10:58:22,258 INFO L226 Difference]: Without dead ends: 787 [2022-11-16 10:58:22,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2022-11-16 10:58:22,259 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 196 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:22,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 0 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 538 Invalid, 0 Unknown, 130 Unchecked, 2.0s Time] [2022-11-16 10:58:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-16 10:58:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 389. [2022-11-16 10:58:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 375 states have (on average 2.792) internal successors, (1047), 388 states have internal predecessors, (1047), 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) [2022-11-16 10:58:22,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 1047 transitions. [2022-11-16 10:58:22,271 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 1047 transitions. Word has length 11 [2022-11-16 10:58:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:22,271 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 1047 transitions. [2022-11-16 10:58:22,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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) [2022-11-16 10:58:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 1047 transitions. [2022-11-16 10:58:22,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:22,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:22,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:22,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:22,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:22,486 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:22,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1060267564, now seen corresponding path program 1 times [2022-11-16 10:58:22,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:22,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1468245285] [2022-11-16 10:58:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:22,487 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 [2022-11-16 10:58:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:22,487 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:22,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 10:58:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 10:58:22,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:22,654 INFO L350 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 [2022-11-16 10:58:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:22,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:23,446 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1468245285] [2022-11-16 10:58:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1468245285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:23,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:23,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 10:58:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108633972] [2022-11-16 10:58:23,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:58:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:58:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:58:23,449 INFO L87 Difference]: Start difference. First operand 389 states and 1047 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:25,323 INFO L93 Difference]: Finished difference Result 810 states and 2033 transitions. [2022-11-16 10:58:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 10:58:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 10:58:25,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:25,327 INFO L225 Difference]: With dead ends: 810 [2022-11-16 10:58:25,327 INFO L226 Difference]: Without dead ends: 810 [2022-11-16 10:58:25,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-11-16 10:58:25,328 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 352 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:25,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 0 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 10:58:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-16 10:58:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 453. [2022-11-16 10:58:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 439 states have (on average 2.931662870159453) internal successors, (1287), 452 states have internal predecessors, (1287), 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) [2022-11-16 10:58:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1287 transitions. [2022-11-16 10:58:25,341 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1287 transitions. Word has length 11 [2022-11-16 10:58:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:25,341 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 1287 transitions. [2022-11-16 10:58:25,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:58:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1287 transitions. [2022-11-16 10:58:25,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:25,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:25,343 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:25,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:25,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:25,555 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash 26863617, now seen corresponding path program 2 times [2022-11-16 10:58:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:25,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046672367] [2022-11-16 10:58:25,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:58:25,556 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 [2022-11-16 10:58:25,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:25,557 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:25,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 10:58:25,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:58:25,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:25,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:58:25,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:25,695 INFO L350 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 [2022-11-16 10:58:25,785 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:25,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:25,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046672367] [2022-11-16 10:58:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046672367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:25,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:25,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:58:25,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486979826] [2022-11-16 10:58:25,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:25,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:58:25,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:25,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:58:25,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:58:25,795 INFO L87 Difference]: Start difference. First operand 453 states and 1287 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-11-16 10:58:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:26,014 INFO L93 Difference]: Finished difference Result 457 states and 1299 transitions. [2022-11-16 10:58:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:58:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 11 [2022-11-16 10:58:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:26,017 INFO L225 Difference]: With dead ends: 457 [2022-11-16 10:58:26,017 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 10:58:26,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:26,017 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:26,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-11-16 10:58:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 10:58:26,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 452. [2022-11-16 10:58:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 438 states have (on average 2.9315068493150687) internal successors, (1284), 451 states have internal predecessors, (1284), 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) [2022-11-16 10:58:26,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1284 transitions. [2022-11-16 10:58:26,024 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1284 transitions. Word has length 11 [2022-11-16 10:58:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:26,024 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 1284 transitions. [2022-11-16 10:58:26,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2022-11-16 10:58:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1284 transitions. [2022-11-16 10:58:26,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 10:58:26,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:26,025 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:26,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-16 10:58:26,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:26,225 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:26,225 INFO L85 PathProgramCache]: Analyzing trace with hash 26863581, now seen corresponding path program 1 times [2022-11-16 10:58:26,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:26,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374450468] [2022-11-16 10:58:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:26,226 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 [2022-11-16 10:58:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:26,227 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:26,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:58:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:26,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 10:58:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:26,388 INFO L350 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 [2022-11-16 10:58:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:58:26,524 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:26,524 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:26,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374450468] [2022-11-16 10:58:26,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374450468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:26,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:26,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:58:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711119669] [2022-11-16 10:58:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:26,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:26,526 INFO L87 Difference]: Start difference. First operand 452 states and 1284 transitions. Second operand has 5 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) [2022-11-16 10:58:26,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:26,774 INFO L93 Difference]: Finished difference Result 455 states and 1290 transitions. [2022-11-16 10:58:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:58:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 11 [2022-11-16 10:58:26,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:26,777 INFO L225 Difference]: With dead ends: 455 [2022-11-16 10:58:26,778 INFO L226 Difference]: Without dead ends: 455 [2022-11-16 10:58:26,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 10:58:26,778 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:26,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-11-16 10:58:26,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-16 10:58:26,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 450. [2022-11-16 10:58:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 436 states have (on average 2.9243119266055047) internal successors, (1275), 449 states have internal predecessors, (1275), 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) [2022-11-16 10:58:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1275 transitions. [2022-11-16 10:58:26,788 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1275 transitions. Word has length 11 [2022-11-16 10:58:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:26,789 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 1275 transitions. [2022-11-16 10:58:26,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-11-16 10:58:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1275 transitions. [2022-11-16 10:58:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 10:58:26,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:26,790 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1] [2022-11-16 10:58:26,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:58:27,002 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:58:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:27,002 INFO L85 PathProgramCache]: Analyzing trace with hash -977617472, now seen corresponding path program 1 times [2022-11-16 10:58:27,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:58:27,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59423241] [2022-11-16 10:58:27,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:27,003 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 [2022-11-16 10:58:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:58:27,004 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:58:27,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 10:58:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 10:58:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:27,169 INFO L350 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 [2022-11-16 10:58:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:27,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:58:30,388 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:58:30,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59423241] [2022-11-16 10:58:30,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59423241] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:30,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:30,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2022-11-16 10:58:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232489099] [2022-11-16 10:58:30,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 10:58:30,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:58:30,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 10:58:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2022-11-16 10:58:30,390 INFO L87 Difference]: Start difference. First operand 450 states and 1275 transitions. Second operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 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) [2022-11-16 10:58:38,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:40,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:42,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:44,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:46,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:48,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:49,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:51,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:58:53,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 10:59:11,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:11,774 INFO L93 Difference]: Finished difference Result 6349 states and 18750 transitions. [2022-11-16 10:59:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 10:59:11,776 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 10:59:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:11,797 INFO L225 Difference]: With dead ends: 6349 [2022-11-16 10:59:11,797 INFO L226 Difference]: Without dead ends: 6349 [2022-11-16 10:59:11,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2022-11-16 10:59:11,798 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2927 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3024 mSolverCounterSat, 206 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2927 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 3024 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:11,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2927 Valid, 0 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 3024 Invalid, 8 Unknown, 0 Unchecked, 29.0s Time] [2022-11-16 10:59:11,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6349 states. [2022-11-16 10:59:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6349 to 485. [2022-11-16 10:59:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 471 states have (on average 2.8556263269639066) internal successors, (1345), 484 states have internal predecessors, (1345), 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) [2022-11-16 10:59:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1345 transitions. [2022-11-16 10:59:11,880 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1345 transitions. Word has length 12 [2022-11-16 10:59:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:11,880 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 1345 transitions. [2022-11-16 10:59:11,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 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) [2022-11-16 10:59:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1345 transitions. [2022-11-16 10:59:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 10:59:11,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:11,882 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:11,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:12,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:12,095 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:12,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:12,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1534941885, now seen corresponding path program 1 times [2022-11-16 10:59:12,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:12,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481134209] [2022-11-16 10:59:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:12,095 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 [2022-11-16 10:59:12,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:12,096 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:12,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 10:59:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:12,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 10:59:12,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:12,326 INFO L350 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 [2022-11-16 10:59:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:59:12,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:59:12,786 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:12,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481134209] [2022-11-16 10:59:12,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481134209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:12,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:12,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 10:59:12,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941598570] [2022-11-16 10:59:12,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:12,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 10:59:12,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:12,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 10:59:12,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:59:12,788 INFO L87 Difference]: Start difference. First operand 485 states and 1345 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 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) [2022-11-16 10:59:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:14,671 INFO L93 Difference]: Finished difference Result 951 states and 2721 transitions. [2022-11-16 10:59:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 10:59:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 10:59:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:14,675 INFO L225 Difference]: With dead ends: 951 [2022-11-16 10:59:14,675 INFO L226 Difference]: Without dead ends: 951 [2022-11-16 10:59:14,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-16 10:59:14,676 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:14,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 294 Invalid, 0 Unknown, 354 Unchecked, 1.6s Time] [2022-11-16 10:59:14,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2022-11-16 10:59:14,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 590. [2022-11-16 10:59:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 576 states have (on average 3.1527777777777777) internal successors, (1816), 589 states have internal predecessors, (1816), 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) [2022-11-16 10:59:14,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1816 transitions. [2022-11-16 10:59:14,695 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1816 transitions. Word has length 12 [2022-11-16 10:59:14,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:14,696 INFO L495 AbstractCegarLoop]: Abstraction has 590 states and 1816 transitions. [2022-11-16 10:59:14,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 12 states have internal predecessors, (20), 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) [2022-11-16 10:59:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1816 transitions. [2022-11-16 10:59:14,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 10:59:14,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:14,697 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:14,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:14,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:14,910 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:14,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:14,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1534941849, now seen corresponding path program 1 times [2022-11-16 10:59:14,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:14,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481137358] [2022-11-16 10:59:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:14,911 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 [2022-11-16 10:59:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:14,912 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:14,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:15,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 10:59:15,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:15,088 INFO L350 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 [2022-11-16 10:59:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:59:15,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:59:15,724 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:15,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481137358] [2022-11-16 10:59:15,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481137358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:15,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:15,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-16 10:59:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842563277] [2022-11-16 10:59:15,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:15,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 10:59:15,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:15,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 10:59:15,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 10:59:15,725 INFO L87 Difference]: Start difference. First operand 590 states and 1816 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 10:59:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:17,565 INFO L93 Difference]: Finished difference Result 898 states and 2673 transitions. [2022-11-16 10:59:17,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 10:59:17,567 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 10:59:17,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:17,571 INFO L225 Difference]: With dead ends: 898 [2022-11-16 10:59:17,571 INFO L226 Difference]: Without dead ends: 898 [2022-11-16 10:59:17,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-11-16 10:59:17,572 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 217 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:17,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 0 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 10:59:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-16 10:59:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 653. [2022-11-16 10:59:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 639 states have (on average 3.383411580594679) internal successors, (2162), 652 states have internal predecessors, (2162), 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) [2022-11-16 10:59:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 2162 transitions. [2022-11-16 10:59:17,590 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 2162 transitions. Word has length 12 [2022-11-16 10:59:17,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:17,591 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 2162 transitions. [2022-11-16 10:59:17,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 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) [2022-11-16 10:59:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 2162 transitions. [2022-11-16 10:59:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:17,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:17,592 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:17,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:17,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:17,805 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:17,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:17,806 INFO L85 PathProgramCache]: Analyzing trace with hash -241028016, now seen corresponding path program 2 times [2022-11-16 10:59:17,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:17,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829025881] [2022-11-16 10:59:17,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:59:17,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:17,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:17,808 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:17,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:17,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:59:17,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:59:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:18,062 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-16 10:59:18,062 INFO L350 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-16 10:59:18,078 INFO L350 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 26 treesize of output 24 [2022-11-16 10:59:18,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:18,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 10:59:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 10:59:18,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:59:18,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:18,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829025881] [2022-11-16 10:59:18,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829025881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:59:18,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:59:18,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:59:18,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205472679] [2022-11-16 10:59:18,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:59:18,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:59:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:59:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:59:18,287 INFO L87 Difference]: Start difference. First operand 653 states and 2162 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) [2022-11-16 10:59:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:18,526 INFO L93 Difference]: Finished difference Result 653 states and 2161 transitions. [2022-11-16 10:59:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:59:18,528 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 13 [2022-11-16 10:59:18,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:18,530 INFO L225 Difference]: With dead ends: 653 [2022-11-16 10:59:18,530 INFO L226 Difference]: Without dead ends: 653 [2022-11-16 10:59:18,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:59:18,531 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:18,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-11-16 10:59:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-11-16 10:59:18,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 652. [2022-11-16 10:59:18,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 638 states have (on average 3.385579937304075) internal successors, (2160), 651 states have internal predecessors, (2160), 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) [2022-11-16 10:59:18,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 2160 transitions. [2022-11-16 10:59:18,543 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 2160 transitions. Word has length 13 [2022-11-16 10:59:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:18,543 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 2160 transitions. [2022-11-16 10:59:18,543 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) [2022-11-16 10:59:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 2160 transitions. [2022-11-16 10:59:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:18,544 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:18,544 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:18,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:18,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:18,756 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:18,756 INFO L85 PathProgramCache]: Analyzing trace with hash -241029225, now seen corresponding path program 1 times [2022-11-16 10:59:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:18,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355601889] [2022-11-16 10:59:18,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:18,757 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:18,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:18,758 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:18,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 10:59:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:19,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 10:59:19,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:19,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:19,046 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:59:19,047 INFO L350 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 12 treesize of output 20 [2022-11-16 10:59:19,052 INFO L350 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 14 treesize of output 12 [2022-11-16 10:59:19,092 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 10:59:19,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:59:19,986 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:19,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:21,998 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:21,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355601889] [2022-11-16 10:59:21,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355601889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:21,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:21,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 10:59:21,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051676909] [2022-11-16 10:59:21,999 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:21,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 10:59:21,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 10:59:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-16 10:59:22,000 INFO L87 Difference]: Start difference. First operand 652 states and 2160 transitions. Second operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:26,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:26,077 INFO L93 Difference]: Finished difference Result 669 states and 2186 transitions. [2022-11-16 10:59:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 10:59:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 10:59:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:26,079 INFO L225 Difference]: With dead ends: 669 [2022-11-16 10:59:26,079 INFO L226 Difference]: Without dead ends: 669 [2022-11-16 10:59:26,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2022-11-16 10:59:26,080 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:26,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 288 Invalid, 0 Unknown, 123 Unchecked, 1.6s Time] [2022-11-16 10:59:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-16 10:59:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 655. [2022-11-16 10:59:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 641 states have (on average 3.3790951638065523) internal successors, (2166), 654 states have internal predecessors, (2166), 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) [2022-11-16 10:59:26,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 2166 transitions. [2022-11-16 10:59:26,090 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 2166 transitions. Word has length 13 [2022-11-16 10:59:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:26,090 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 2166 transitions. [2022-11-16 10:59:26,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 2166 transitions. [2022-11-16 10:59:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:26,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:26,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:26,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:26,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:26,304 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:26,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:26,304 INFO L85 PathProgramCache]: Analyzing trace with hash -178852324, now seen corresponding path program 1 times [2022-11-16 10:59:26,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:26,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685629950] [2022-11-16 10:59:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:26,306 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:26,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-16 10:59:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:59:26,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:26,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:59:26,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:26,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685629950] [2022-11-16 10:59:26,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685629950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:59:26,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:59:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:59:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873357443] [2022-11-16 10:59:26,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:59:26,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:59:26,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:59:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:59:26,641 INFO L87 Difference]: Start difference. First operand 655 states and 2166 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-16 10:59:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:27,035 INFO L93 Difference]: Finished difference Result 666 states and 2175 transitions. [2022-11-16 10:59:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:59:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 [2022-11-16 10:59:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:27,038 INFO L225 Difference]: With dead ends: 666 [2022-11-16 10:59:27,038 INFO L226 Difference]: Without dead ends: 655 [2022-11-16 10:59:27,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:59:27,039 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:27,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:59:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-16 10:59:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 649. [2022-11-16 10:59:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 635 states have (on average 3.3606299212598425) internal successors, (2134), 648 states have internal predecessors, (2134), 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) [2022-11-16 10:59:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2134 transitions. [2022-11-16 10:59:27,054 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2134 transitions. Word has length 13 [2022-11-16 10:59:27,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:27,054 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 2134 transitions. [2022-11-16 10:59:27,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-16 10:59:27,054 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2134 transitions. [2022-11-16 10:59:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:27,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:27,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:27,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:27,267 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash 448110266, now seen corresponding path program 2 times [2022-11-16 10:59:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:27,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [477726762] [2022-11-16 10:59:27,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:59:27,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:27,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:27,268 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:27,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:27,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 10:59:27,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:27,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 10:59:27,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:27,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:59:27,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:27,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [477726762] [2022-11-16 10:59:27,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [477726762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:59:27,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:59:27,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:59:27,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954047378] [2022-11-16 10:59:27,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:59:27,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:59:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:27,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:59:27,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:59:27,552 INFO L87 Difference]: Start difference. First operand 649 states and 2134 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-16 10:59:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:27,931 INFO L93 Difference]: Finished difference Result 654 states and 2138 transitions. [2022-11-16 10:59:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:59:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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 [2022-11-16 10:59:27,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:27,933 INFO L225 Difference]: With dead ends: 654 [2022-11-16 10:59:27,934 INFO L226 Difference]: Without dead ends: 647 [2022-11-16 10:59:27,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:59:27,934 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:27,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 3 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:59:27,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-16 10:59:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 647. [2022-11-16 10:59:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 633 states have (on average 3.352290679304897) internal successors, (2122), 646 states have internal predecessors, (2122), 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) [2022-11-16 10:59:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 2122 transitions. [2022-11-16 10:59:27,947 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 2122 transitions. Word has length 13 [2022-11-16 10:59:27,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:27,947 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 2122 transitions. [2022-11-16 10:59:27,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 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) [2022-11-16 10:59:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 2122 transitions. [2022-11-16 10:59:27,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:27,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:27,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:27,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:28,160 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:28,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 989651830, now seen corresponding path program 1 times [2022-11-16 10:59:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:28,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [228276453] [2022-11-16 10:59:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:28,161 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 [2022-11-16 10:59:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:28,162 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:28,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 10:59:28,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:28,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 10:59:28,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:59:28,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:59:28,430 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:28,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [228276453] [2022-11-16 10:59:28,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [228276453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:59:28,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:59:28,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:59:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548078462] [2022-11-16 10:59:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:59:28,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 10:59:28,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 10:59:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:59:28,432 INFO L87 Difference]: Start difference. First operand 647 states and 2122 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-11-16 10:59:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:29,133 INFO L93 Difference]: Finished difference Result 862 states and 2707 transitions. [2022-11-16 10:59:29,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:59:29,134 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 [2022-11-16 10:59:29,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:29,136 INFO L225 Difference]: With dead ends: 862 [2022-11-16 10:59:29,136 INFO L226 Difference]: Without dead ends: 862 [2022-11-16 10:59:29,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:59:29,137 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:29,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 0 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 10:59:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-11-16 10:59:29,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 639. [2022-11-16 10:59:29,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 625 states have (on average 3.3568) internal successors, (2098), 638 states have internal predecessors, (2098), 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) [2022-11-16 10:59:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2098 transitions. [2022-11-16 10:59:29,161 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2098 transitions. Word has length 13 [2022-11-16 10:59:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:29,161 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2098 transitions. [2022-11-16 10:59:29,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2022-11-16 10:59:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2098 transitions. [2022-11-16 10:59:29,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:29,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:29,162 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:29,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:29,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:29,367 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:29,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1040727937, now seen corresponding path program 2 times [2022-11-16 10:59:29,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:29,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019336446] [2022-11-16 10:59:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:59:29,367 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 [2022-11-16 10:59:29,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:29,368 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:29,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 10:59:29,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:59:29,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:59:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:29,674 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 10:59:29,675 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-16 10:59:29,736 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:59:29,736 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:59:29,824 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:59:29,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 10:59:29,845 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:59:29,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:59:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:59:29,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:32,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 10:59:32,959 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:32,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019336446] [2022-11-16 10:59:32,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019336446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:32,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:32,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-16 10:59:32,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318487439] [2022-11-16 10:59:32,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:32,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 10:59:32,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:32,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 10:59:32,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-11-16 10:59:32,960 INFO L87 Difference]: Start difference. First operand 639 states and 2098 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2022-11-16 10:59:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:36,590 INFO L93 Difference]: Finished difference Result 1301 states and 3911 transitions. [2022-11-16 10:59:36,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 10:59:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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 [2022-11-16 10:59:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:36,593 INFO L225 Difference]: With dead ends: 1301 [2022-11-16 10:59:36,593 INFO L226 Difference]: Without dead ends: 1301 [2022-11-16 10:59:36,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-11-16 10:59:36,594 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 263 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:36,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 0 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1141 Invalid, 0 Unknown, 169 Unchecked, 3.3s Time] [2022-11-16 10:59:36,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-11-16 10:59:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 639. [2022-11-16 10:59:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 625 states have (on average 3.3056) internal successors, (2066), 638 states have internal predecessors, (2066), 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) [2022-11-16 10:59:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2066 transitions. [2022-11-16 10:59:36,611 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2066 transitions. Word has length 13 [2022-11-16 10:59:36,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:36,612 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2066 transitions. [2022-11-16 10:59:36,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 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) [2022-11-16 10:59:36,612 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2066 transitions. [2022-11-16 10:59:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:59:36,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:36,613 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:36,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-16 10:59:36,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:36,826 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:36,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1009998135, now seen corresponding path program 3 times [2022-11-16 10:59:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:36,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558914807] [2022-11-16 10:59:36,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:59:36,826 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 [2022-11-16 10:59:36,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:36,827 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:36,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:37,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 10:59:37,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 10:59:37,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:37,098 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-16 10:59:37,099 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-16 10:59:37,156 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:59:37,156 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 10:59:37,243 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 10:59:37,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 10:59:37,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 10:59:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:37,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:41,675 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:41,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558914807] [2022-11-16 10:59:41,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558914807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:41,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:41,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2022-11-16 10:59:41,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745308870] [2022-11-16 10:59:41,675 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:41,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 10:59:41,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 10:59:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-16 10:59:41,676 INFO L87 Difference]: Start difference. First operand 639 states and 2066 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:42,832 INFO L93 Difference]: Finished difference Result 651 states and 2099 transitions. [2022-11-16 10:59:42,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 10:59:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 10:59:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:42,834 INFO L225 Difference]: With dead ends: 651 [2022-11-16 10:59:42,834 INFO L226 Difference]: Without dead ends: 651 [2022-11-16 10:59:42,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-16 10:59:42,835 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:42,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2022-11-16 10:59:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-11-16 10:59:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 648. [2022-11-16 10:59:42,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 634 states have (on average 3.302839116719243) internal successors, (2094), 647 states have internal predecessors, (2094), 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) [2022-11-16 10:59:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2094 transitions. [2022-11-16 10:59:42,847 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2094 transitions. Word has length 13 [2022-11-16 10:59:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:42,847 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2094 transitions. [2022-11-16 10:59:42,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:59:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2094 transitions. [2022-11-16 10:59:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 10:59:42,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:42,849 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:42,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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 [2022-11-16 10:59:43,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:43,061 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:43,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:43,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1118030781, now seen corresponding path program 1 times [2022-11-16 10:59:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:43,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890884721] [2022-11-16 10:59:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:43,062 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 [2022-11-16 10:59:43,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:43,065 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:43,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 10:59:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:43,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 10:59:43,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:43,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:43,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:43,429 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:59:43,429 INFO L350 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 12 treesize of output 20 [2022-11-16 10:59:43,435 INFO L350 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 14 treesize of output 12 [2022-11-16 10:59:43,493 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 10:59:43,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:59:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:44,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:59:46,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890884721] [2022-11-16 10:59:46,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890884721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:46,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:46,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 10:59:46,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814814941] [2022-11-16 10:59:46,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:46,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 10:59:46,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:46,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 10:59:46,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-16 10:59:46,709 INFO L87 Difference]: Start difference. First operand 648 states and 2094 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-16 10:59:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:50,517 INFO L93 Difference]: Finished difference Result 732 states and 2234 transitions. [2022-11-16 10:59:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 10:59:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 10:59:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:50,519 INFO L225 Difference]: With dead ends: 732 [2022-11-16 10:59:50,519 INFO L226 Difference]: Without dead ends: 732 [2022-11-16 10:59:50,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=335, Invalid=721, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 10:59:50,520 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 111 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:50,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 185 Invalid, 0 Unknown, 106 Unchecked, 0.7s Time] [2022-11-16 10:59:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-11-16 10:59:50,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 648. [2022-11-16 10:59:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 634 states have (on average 3.302839116719243) internal successors, (2094), 647 states have internal predecessors, (2094), 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) [2022-11-16 10:59:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2094 transitions. [2022-11-16 10:59:50,532 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2094 transitions. Word has length 14 [2022-11-16 10:59:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:50,533 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2094 transitions. [2022-11-16 10:59:50,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-16 10:59:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2094 transitions. [2022-11-16 10:59:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 10:59:50,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:50,534 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:50,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:50,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:50,747 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash 674741018, now seen corresponding path program 1 times [2022-11-16 10:59:50,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:50,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481477435] [2022-11-16 10:59:50,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:50,748 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 [2022-11-16 10:59:50,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:50,749 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:50,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-16 10:59:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 10:59:51,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:51,066 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 10:59:51,067 INFO L350 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 12 treesize of output 20 [2022-11-16 10:59:51,072 INFO L350 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 14 treesize of output 12 [2022-11-16 10:59:51,125 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-16 10:59:51,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 10:59:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:52,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:54,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 10:59:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481477435] [2022-11-16 10:59:54,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481477435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:54,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:54,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-16 10:59:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057156650] [2022-11-16 10:59:54,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:54,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-16 10:59:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 10:59:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-16 10:59:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2022-11-16 10:59:54,178 INFO L87 Difference]: Start difference. First operand 648 states and 2094 transitions. Second operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-16 10:59:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:59,274 INFO L93 Difference]: Finished difference Result 1937 states and 6354 transitions. [2022-11-16 10:59:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 10:59:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 10:59:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:59,280 INFO L225 Difference]: With dead ends: 1937 [2022-11-16 10:59:59,280 INFO L226 Difference]: Without dead ends: 1937 [2022-11-16 10:59:59,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=396, Invalid=864, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 10:59:59,280 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 358 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 772 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:59,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 0 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 496 Invalid, 0 Unknown, 772 Unchecked, 2.0s Time] [2022-11-16 10:59:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2022-11-16 10:59:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 648. [2022-11-16 10:59:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 634 states have (on average 3.302839116719243) internal successors, (2094), 647 states have internal predecessors, (2094), 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) [2022-11-16 10:59:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2094 transitions. [2022-11-16 10:59:59,297 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2094 transitions. Word has length 14 [2022-11-16 10:59:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:59,298 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2094 transitions. [2022-11-16 10:59:59,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2022-11-16 10:59:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2094 transitions. [2022-11-16 10:59:59,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 10:59:59,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:59,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:59,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:59,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 10:59:59,503 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 10:59:59,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:59,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2097168250, now seen corresponding path program 3 times [2022-11-16 10:59:59,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 10:59:59,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261867512] [2022-11-16 10:59:59,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:59:59,504 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 [2022-11-16 10:59:59,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 10:59:59,505 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 10:59:59,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 10:59:59,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 10:59:59,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:59,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 10:59:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:59,822 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 10:59:59,822 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 10:59:59,904 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 10:59:59,904 INFO L350 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-16 11:00:00,048 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:00:00,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-16 11:00:00,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-11-16 11:00:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:00:00,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:00:01,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:00:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261867512] [2022-11-16 11:00:01,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261867512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:01,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:01,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-11-16 11:00:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81570459] [2022-11-16 11:00:01,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:00:01,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:00:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:00:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:00:01,781 INFO L87 Difference]: Start difference. First operand 648 states and 2094 transitions. Second operand has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:00:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:06,695 INFO L93 Difference]: Finished difference Result 1057 states and 3035 transitions. [2022-11-16 11:00:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:00:06,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:00:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:06,699 INFO L225 Difference]: With dead ends: 1057 [2022-11-16 11:00:06,699 INFO L226 Difference]: Without dead ends: 1057 [2022-11-16 11:00:06,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:00:06,699 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 255 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:06,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 0 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 585 Invalid, 0 Unknown, 60 Unchecked, 3.1s Time] [2022-11-16 11:00:06,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-11-16 11:00:06,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 620. [2022-11-16 11:00:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 606 states have (on average 3.2557755775577557) internal successors, (1973), 619 states have internal predecessors, (1973), 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) [2022-11-16 11:00:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1973 transitions. [2022-11-16 11:00:06,715 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1973 transitions. Word has length 14 [2022-11-16 11:00:06,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:06,715 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1973 transitions. [2022-11-16 11:00:06,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:00:06,715 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1973 transitions. [2022-11-16 11:00:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:00:06,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:06,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:00:06,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 11:00:06,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:00:06,929 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:00:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash 849238661, now seen corresponding path program 4 times [2022-11-16 11:00:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:00:06,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74071161] [2022-11-16 11:00:06,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:00:06,930 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 [2022-11-16 11:00:06,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:00:06,931 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:00:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 11:00:07,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:00:07,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:00:07,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:00:07,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:00:07,256 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 11:00:07,256 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 11:00:07,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:00:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:00:07,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:00:08,004 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:00:08,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74071161] [2022-11-16 11:00:08,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74071161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:08,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:08,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-16 11:00:08,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450217408] [2022-11-16 11:00:08,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:08,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:00:08,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:00:08,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:00:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:00:08,006 INFO L87 Difference]: Start difference. First operand 620 states and 1973 transitions. Second operand has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:00:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:10,881 INFO L93 Difference]: Finished difference Result 1175 states and 3488 transitions. [2022-11-16 11:00:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:00:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:00:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:10,884 INFO L225 Difference]: With dead ends: 1175 [2022-11-16 11:00:10,884 INFO L226 Difference]: Without dead ends: 1175 [2022-11-16 11:00:10,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:00:10,891 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 170 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:10,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:00:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-11-16 11:00:10,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 789. [2022-11-16 11:00:10,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 775 states have (on average 3.3238709677419354) internal successors, (2576), 788 states have internal predecessors, (2576), 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) [2022-11-16 11:00:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2576 transitions. [2022-11-16 11:00:10,904 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2576 transitions. Word has length 14 [2022-11-16 11:00:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:10,904 INFO L495 AbstractCegarLoop]: Abstraction has 789 states and 2576 transitions. [2022-11-16 11:00:10,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:00:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2576 transitions. [2022-11-16 11:00:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:00:10,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:10,905 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1] [2022-11-16 11:00:10,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 11:00:11,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:00:11,119 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:00:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:11,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1917015873, now seen corresponding path program 3 times [2022-11-16 11:00:11,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:00:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [938708506] [2022-11-16 11:00:11,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:00:11,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:00:11,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:00:11,121 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:00:11,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 11:00:11,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-16 11:00:11,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:00:11,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:00:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:00:11,566 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-16 11:00:11,566 INFO L350 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-16 11:00:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:00:12,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:17,014 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:00:17,014 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:00:17,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [938708506] [2022-11-16 11:00:17,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [938708506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:17,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:17,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-11-16 11:00:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993860226] [2022-11-16 11:00:17,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:17,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 11:00:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:00:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 11:00:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:00:17,016 INFO L87 Difference]: Start difference. First operand 789 states and 2576 transitions. Second operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2022-11-16 11:00:31,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:33,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:35,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:37,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:39,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:41,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:43,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:45,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:49,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:51,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:00:53,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:01:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:12,398 INFO L93 Difference]: Finished difference Result 8822 states and 31053 transitions. [2022-11-16 11:01:12,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 11:01:12,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:01:12,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:12,423 INFO L225 Difference]: With dead ends: 8822 [2022-11-16 11:01:12,423 INFO L226 Difference]: Without dead ends: 8822 [2022-11-16 11:01:12,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:01:12,423 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4635 mSolverCounterSat, 389 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 4635 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:12,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2302 Valid, 0 Invalid, 5036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 4635 Invalid, 12 Unknown, 0 Unchecked, 35.8s Time] [2022-11-16 11:01:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2022-11-16 11:01:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 803. [2022-11-16 11:01:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 789 states have (on average 3.300380228136882) internal successors, (2604), 802 states have internal predecessors, (2604), 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) [2022-11-16 11:01:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2604 transitions. [2022-11-16 11:01:12,530 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2604 transitions. Word has length 14 [2022-11-16 11:01:12,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:12,530 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 2604 transitions. [2022-11-16 11:01:12,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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) [2022-11-16 11:01:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2604 transitions. [2022-11-16 11:01:12,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:12,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:12,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:12,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 11:01:12,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:12,744 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:12,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1235052603, now seen corresponding path program 1 times [2022-11-16 11:01:12,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:12,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519696872] [2022-11-16 11:01:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:12,745 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 [2022-11-16 11:01:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:12,746 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:12,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 11:01:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:12,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:12,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:13,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:13,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:13,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519696872] [2022-11-16 11:01:13,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519696872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:13,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:13,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043710251] [2022-11-16 11:01:13,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:13,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:13,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:13,471 INFO L87 Difference]: Start difference. First operand 803 states and 2604 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:14,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:14,291 INFO L93 Difference]: Finished difference Result 841 states and 2666 transitions. [2022-11-16 11:01:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:14,293 INFO L225 Difference]: With dead ends: 841 [2022-11-16 11:01:14,293 INFO L226 Difference]: Without dead ends: 832 [2022-11-16 11:01:14,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:14,294 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:14,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 5 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-11-16 11:01:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-16 11:01:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 810. [2022-11-16 11:01:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 796 states have (on average 3.2876884422110555) internal successors, (2617), 809 states have internal predecessors, (2617), 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) [2022-11-16 11:01:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2617 transitions. [2022-11-16 11:01:14,305 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2617 transitions. Word has length 15 [2022-11-16 11:01:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:14,305 INFO L495 AbstractCegarLoop]: Abstraction has 810 states and 2617 transitions. [2022-11-16 11:01:14,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2617 transitions. [2022-11-16 11:01:14,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:14,306 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:14,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:14,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:14,518 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:14,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1776082991, now seen corresponding path program 2 times [2022-11-16 11:01:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:14,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968717789] [2022-11-16 11:01:14,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:01:14,519 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 [2022-11-16 11:01:14,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:14,520 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:14,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 11:01:14,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:01:14,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:15,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:15,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:15,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968717789] [2022-11-16 11:01:15,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968717789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:15,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:15,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:15,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467788952] [2022-11-16 11:01:15,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:15,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:15,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:15,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:15,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:15,182 INFO L87 Difference]: Start difference. First operand 810 states and 2617 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:16,060 INFO L93 Difference]: Finished difference Result 849 states and 2677 transitions. [2022-11-16 11:01:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:16,063 INFO L225 Difference]: With dead ends: 849 [2022-11-16 11:01:16,063 INFO L226 Difference]: Without dead ends: 842 [2022-11-16 11:01:16,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:16,063 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 43 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:16,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 6 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 162 Invalid, 0 Unknown, 45 Unchecked, 0.5s Time] [2022-11-16 11:01:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2022-11-16 11:01:16,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 813. [2022-11-16 11:01:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 799 states have (on average 3.2816020025031287) internal successors, (2622), 812 states have internal predecessors, (2622), 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) [2022-11-16 11:01:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2622 transitions. [2022-11-16 11:01:16,081 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2622 transitions. Word has length 15 [2022-11-16 11:01:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:16,081 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 2622 transitions. [2022-11-16 11:01:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2622 transitions. [2022-11-16 11:01:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:16,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:16,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:16,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:16,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:16,294 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:16,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:16,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1221970391, now seen corresponding path program 3 times [2022-11-16 11:01:16,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:16,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253264877] [2022-11-16 11:01:16,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:01:16,295 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 [2022-11-16 11:01:16,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:16,297 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:16,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 11:01:16,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:01:16,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:16,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:16,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:16,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:16,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253264877] [2022-11-16 11:01:16,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253264877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:16,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:16,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:16,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371550573] [2022-11-16 11:01:16,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:16,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:16,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:16,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:16,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:16,948 INFO L87 Difference]: Start difference. First operand 813 states and 2622 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:18,053 INFO L93 Difference]: Finished difference Result 846 states and 2670 transitions. [2022-11-16 11:01:18,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:01:18,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:18,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:18,056 INFO L225 Difference]: With dead ends: 846 [2022-11-16 11:01:18,056 INFO L226 Difference]: Without dead ends: 839 [2022-11-16 11:01:18,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:01:18,057 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:18,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 8 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 55 Unchecked, 0.7s Time] [2022-11-16 11:01:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-16 11:01:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 812. [2022-11-16 11:01:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 798 states have (on average 3.280701754385965) internal successors, (2618), 811 states have internal predecessors, (2618), 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) [2022-11-16 11:01:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2618 transitions. [2022-11-16 11:01:18,076 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2618 transitions. Word has length 15 [2022-11-16 11:01:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:18,076 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 2618 transitions. [2022-11-16 11:01:18,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2618 transitions. [2022-11-16 11:01:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:18,077 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:18,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:18,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 11:01:18,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:18,278 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:18,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:18,278 INFO L85 PathProgramCache]: Analyzing trace with hash -72605435, now seen corresponding path program 4 times [2022-11-16 11:01:18,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:18,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102396865] [2022-11-16 11:01:18,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:01:18,279 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 [2022-11-16 11:01:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:18,280 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:18,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 11:01:18,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:01:18,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:19,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:19,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:19,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102396865] [2022-11-16 11:01:19,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102396865] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:19,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:19,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181902229] [2022-11-16 11:01:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:19,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:19,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:19,129 INFO L87 Difference]: Start difference. First operand 812 states and 2618 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:20,476 INFO L93 Difference]: Finished difference Result 846 states and 2669 transitions. [2022-11-16 11:01:20,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:20,477 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:20,479 INFO L225 Difference]: With dead ends: 846 [2022-11-16 11:01:20,479 INFO L226 Difference]: Without dead ends: 836 [2022-11-16 11:01:20,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:20,480 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:20,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 7 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 46 Unchecked, 0.9s Time] [2022-11-16 11:01:20,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-11-16 11:01:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 819. [2022-11-16 11:01:20,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 805 states have (on average 3.26583850931677) internal successors, (2629), 818 states have internal predecessors, (2629), 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) [2022-11-16 11:01:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2629 transitions. [2022-11-16 11:01:20,501 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2629 transitions. Word has length 15 [2022-11-16 11:01:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:20,502 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 2629 transitions. [2022-11-16 11:01:20,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2629 transitions. [2022-11-16 11:01:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:20,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:20,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:20,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:20,719 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -920776337, now seen corresponding path program 5 times [2022-11-16 11:01:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:20,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473939196] [2022-11-16 11:01:20,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:01:20,720 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 [2022-11-16 11:01:20,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:20,721 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-16 11:01:20,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:01:20,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:21,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:21,554 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:21,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473939196] [2022-11-16 11:01:21,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473939196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:21,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:21,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:21,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317947671] [2022-11-16 11:01:21,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:21,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:21,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:21,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:21,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:21,556 INFO L87 Difference]: Start difference. First operand 819 states and 2629 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:22,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:22,786 INFO L93 Difference]: Finished difference Result 845 states and 2661 transitions. [2022-11-16 11:01:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:22,789 INFO L225 Difference]: With dead ends: 845 [2022-11-16 11:01:22,789 INFO L226 Difference]: Without dead ends: 838 [2022-11-16 11:01:22,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:22,790 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 46 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:22,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 178 Invalid, 0 Unknown, 41 Unchecked, 0.8s Time] [2022-11-16 11:01:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-11-16 11:01:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 821. [2022-11-16 11:01:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 807 states have (on average 3.26270136307311) internal successors, (2633), 820 states have internal predecessors, (2633), 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) [2022-11-16 11:01:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2633 transitions. [2022-11-16 11:01:22,807 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2633 transitions. Word has length 15 [2022-11-16 11:01:22,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:22,807 INFO L495 AbstractCegarLoop]: Abstraction has 821 states and 2633 transitions. [2022-11-16 11:01:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2633 transitions. [2022-11-16 11:01:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:22,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:22,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:22,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:23,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:23,010 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:23,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -366663737, now seen corresponding path program 6 times [2022-11-16 11:01:23,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:23,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279443426] [2022-11-16 11:01:23,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:01:23,011 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 [2022-11-16 11:01:23,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:23,013 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:23,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 11:01:23,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 11:01:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:23,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:23,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:23,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:23,832 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:23,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279443426] [2022-11-16 11:01:23,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279443426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:23,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:23,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:23,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719879700] [2022-11-16 11:01:23,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:23,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:23,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:23,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:23,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:23,833 INFO L87 Difference]: Start difference. First operand 821 states and 2633 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:24,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:24,993 INFO L93 Difference]: Finished difference Result 837 states and 2649 transitions. [2022-11-16 11:01:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:24,995 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:24,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:24,997 INFO L225 Difference]: With dead ends: 837 [2022-11-16 11:01:24,997 INFO L226 Difference]: Without dead ends: 829 [2022-11-16 11:01:24,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:24,997 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:24,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 5 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 46 Unchecked, 0.7s Time] [2022-11-16 11:01:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-11-16 11:01:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 817. [2022-11-16 11:01:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 803 states have (on average 3.268991282689913) internal successors, (2625), 816 states have internal predecessors, (2625), 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) [2022-11-16 11:01:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2625 transitions. [2022-11-16 11:01:25,015 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2625 transitions. Word has length 15 [2022-11-16 11:01:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:25,015 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 2625 transitions. [2022-11-16 11:01:25,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2625 transitions. [2022-11-16 11:01:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:25,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:25,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:25,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-16 11:01:25,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:25,217 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1194898183, now seen corresponding path program 7 times [2022-11-16 11:01:25,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:25,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [833954201] [2022-11-16 11:01:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:01:25,218 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 [2022-11-16 11:01:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:25,219 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:25,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-16 11:01:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:01:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:25,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:26,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:26,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:26,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:26,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [833954201] [2022-11-16 11:01:26,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [833954201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:26,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:26,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:26,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850947678] [2022-11-16 11:01:26,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:26,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:26,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:26,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:26,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:26,122 INFO L87 Difference]: Start difference. First operand 817 states and 2625 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:27,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:27,598 INFO L93 Difference]: Finished difference Result 827 states and 2635 transitions. [2022-11-16 11:01:27,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:27,602 INFO L225 Difference]: With dead ends: 827 [2022-11-16 11:01:27,602 INFO L226 Difference]: Without dead ends: 821 [2022-11-16 11:01:27,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:27,602 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:27,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 8 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 33 Unchecked, 1.0s Time] [2022-11-16 11:01:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-16 11:01:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 818. [2022-11-16 11:01:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 804 states have (on average 3.2661691542288556) internal successors, (2626), 817 states have internal predecessors, (2626), 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) [2022-11-16 11:01:27,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2626 transitions. [2022-11-16 11:01:27,619 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2626 transitions. Word has length 15 [2022-11-16 11:01:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:27,619 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 2626 transitions. [2022-11-16 11:01:27,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2626 transitions. [2022-11-16 11:01:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:27,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:27,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:27,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-16 11:01:27,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:27,821 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:27,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:27,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1192519599, now seen corresponding path program 8 times [2022-11-16 11:01:27,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:27,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116482644] [2022-11-16 11:01:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:01:27,822 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:27,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:27,823 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:27,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 11:01:28,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:01:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:28,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:28,689 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:28,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116482644] [2022-11-16 11:01:28,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116482644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:28,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:28,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:28,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708448358] [2022-11-16 11:01:28,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:28,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:28,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:28,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:28,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:28,691 INFO L87 Difference]: Start difference. First operand 818 states and 2626 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:29,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:29,952 INFO L93 Difference]: Finished difference Result 828 states and 2635 transitions. [2022-11-16 11:01:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:29,957 INFO L225 Difference]: With dead ends: 828 [2022-11-16 11:01:29,957 INFO L226 Difference]: Without dead ends: 820 [2022-11-16 11:01:29,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:29,958 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 48 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:29,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 7 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 44 Unchecked, 0.8s Time] [2022-11-16 11:01:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-11-16 11:01:29,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 816. [2022-11-16 11:01:29,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 802 states have (on average 3.270573566084788) internal successors, (2623), 815 states have internal predecessors, (2623), 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) [2022-11-16 11:01:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2623 transitions. [2022-11-16 11:01:29,987 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2623 transitions. Word has length 15 [2022-11-16 11:01:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:29,988 INFO L495 AbstractCegarLoop]: Abstraction has 816 states and 2623 transitions. [2022-11-16 11:01:29,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2623 transitions. [2022-11-16 11:01:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:29,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:29,989 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:30,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 11:01:30,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:30,189 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:30,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1831872429, now seen corresponding path program 9 times [2022-11-16 11:01:30,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:30,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1863413928] [2022-11-16 11:01:30,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:01:30,191 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 [2022-11-16 11:01:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:30,192 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:30,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 11:01:30,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:01:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:31,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:31,046 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:31,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1863413928] [2022-11-16 11:01:31,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1863413928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:31,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:31,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:31,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314225368] [2022-11-16 11:01:31,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:31,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:31,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:31,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:31,048 INFO L87 Difference]: Start difference. First operand 816 states and 2623 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:32,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:32,385 INFO L93 Difference]: Finished difference Result 826 states and 2632 transitions. [2022-11-16 11:01:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:32,390 INFO L225 Difference]: With dead ends: 826 [2022-11-16 11:01:32,390 INFO L226 Difference]: Without dead ends: 817 [2022-11-16 11:01:32,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:32,391 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 53 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:32,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 7 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 189 Invalid, 0 Unknown, 40 Unchecked, 0.9s Time] [2022-11-16 11:01:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-11-16 11:01:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 813. [2022-11-16 11:01:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 799 states have (on average 3.2753441802252814) internal successors, (2617), 812 states have internal predecessors, (2617), 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) [2022-11-16 11:01:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2617 transitions. [2022-11-16 11:01:32,416 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2617 transitions. Word has length 15 [2022-11-16 11:01:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:32,416 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 2617 transitions. [2022-11-16 11:01:32,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2617 transitions. [2022-11-16 11:01:32,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:32,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:32,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:32,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:32,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:32,634 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:32,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1939600681, now seen corresponding path program 10 times [2022-11-16 11:01:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:32,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [628162595] [2022-11-16 11:01:32,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:01:32,635 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 [2022-11-16 11:01:32,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:32,636 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:32,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 11:01:32,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:01:32,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:32,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:33,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:33,495 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:33,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [628162595] [2022-11-16 11:01:33,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [628162595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:33,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:33,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:33,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473313051] [2022-11-16 11:01:33,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:33,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:33,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:33,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:33,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:33,497 INFO L87 Difference]: Start difference. First operand 813 states and 2617 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:34,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:34,565 INFO L93 Difference]: Finished difference Result 819 states and 2622 transitions. [2022-11-16 11:01:34,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:34,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:34,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:34,568 INFO L225 Difference]: With dead ends: 819 [2022-11-16 11:01:34,568 INFO L226 Difference]: Without dead ends: 813 [2022-11-16 11:01:34,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:34,569 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:34,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 5 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-11-16 11:01:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-11-16 11:01:34,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 812. [2022-11-16 11:01:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 798 states have (on average 3.2769423558897244) internal successors, (2615), 811 states have internal predecessors, (2615), 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) [2022-11-16 11:01:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 2615 transitions. [2022-11-16 11:01:34,590 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 2615 transitions. Word has length 15 [2022-11-16 11:01:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:34,591 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 2615 transitions. [2022-11-16 11:01:34,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 2615 transitions. [2022-11-16 11:01:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:34,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:34,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:34,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:34,807 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:34,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1937222097, now seen corresponding path program 11 times [2022-11-16 11:01:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:34,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925323951] [2022-11-16 11:01:34,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:01:34,808 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 [2022-11-16 11:01:34,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:34,809 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:34,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 11:01:35,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:01:35,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:35,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:01:35,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:01:35,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:01:35,770 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925323951] [2022-11-16 11:01:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925323951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:01:35,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:01:35,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:01:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887326568] [2022-11-16 11:01:35,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:01:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:01:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:01:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:01:35,771 INFO L87 Difference]: Start difference. First operand 812 states and 2615 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:36,900 INFO L93 Difference]: Finished difference Result 817 states and 2619 transitions. [2022-11-16 11:01:36,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:01:36,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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 15 [2022-11-16 11:01:36,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:36,904 INFO L225 Difference]: With dead ends: 817 [2022-11-16 11:01:36,904 INFO L226 Difference]: Without dead ends: 803 [2022-11-16 11:01:36,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:01:36,904 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:36,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 6 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 40 Unchecked, 0.7s Time] [2022-11-16 11:01:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-11-16 11:01:36,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2022-11-16 11:01:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 789 states have (on average 3.299112801013942) internal successors, (2603), 802 states have internal predecessors, (2603), 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) [2022-11-16 11:01:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2603 transitions. [2022-11-16 11:01:36,920 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2603 transitions. Word has length 15 [2022-11-16 11:01:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:36,920 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 2603 transitions. [2022-11-16 11:01:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 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) [2022-11-16 11:01:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2603 transitions. [2022-11-16 11:01:36,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:36,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:36,921 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:36,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 11:01:37,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:37,127 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:37,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:37,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1059062010, now seen corresponding path program 2 times [2022-11-16 11:01:37,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:37,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056537933] [2022-11-16 11:01:37,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:01:37,128 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 [2022-11-16 11:01:37,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:37,129 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-16 11:01:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:01:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:37,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:01:37,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:37,474 INFO L350 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 [2022-11-16 11:01:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:01:38,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:01:40,085 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056537933] [2022-11-16 11:01:40,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056537933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:01:40,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:01:40,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-16 11:01:40,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845003419] [2022-11-16 11:01:40,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:01:40,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:01:40,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:40,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:01:40,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:01:40,087 INFO L87 Difference]: Start difference. First operand 803 states and 2603 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:55,322 INFO L93 Difference]: Finished difference Result 2045 states and 6251 transitions. [2022-11-16 11:01:55,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:01:55,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:01:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:55,332 INFO L225 Difference]: With dead ends: 2045 [2022-11-16 11:01:55,332 INFO L226 Difference]: Without dead ends: 2045 [2022-11-16 11:01:55,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2022-11-16 11:01:55,333 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 605 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 0 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-16 11:01:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-11-16 11:01:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1221. [2022-11-16 11:01:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1207 states have (on average 3.4341342170671085) internal successors, (4145), 1220 states have internal predecessors, (4145), 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) [2022-11-16 11:01:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 4145 transitions. [2022-11-16 11:01:55,389 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 4145 transitions. Word has length 15 [2022-11-16 11:01:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:55,390 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 4145 transitions. [2022-11-16 11:01:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:01:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 4145 transitions. [2022-11-16 11:01:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:01:55,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:55,392 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:55,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:55,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:01:55,607 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:01:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash -826654878, now seen corresponding path program 5 times [2022-11-16 11:01:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:01:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490066888] [2022-11-16 11:01:55,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:01:55,608 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 [2022-11-16 11:01:55,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:01:55,609 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:01:55,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 11:01:56,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 11:01:56,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:56,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:01:56,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:01:56,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:56,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:01:56,902 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:01:56,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490066888] [2022-11-16 11:01:56,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490066888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:01:56,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:01:56,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-16 11:01:56,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322309147] [2022-11-16 11:01:56,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:01:56,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:01:56,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:01:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:01:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:01:56,903 INFO L87 Difference]: Start difference. First operand 1221 states and 4145 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-11-16 11:02:01,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:01,961 INFO L93 Difference]: Finished difference Result 2077 states and 6490 transitions. [2022-11-16 11:02:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:02:01,963 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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 15 [2022-11-16 11:02:01,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:01,968 INFO L225 Difference]: With dead ends: 2077 [2022-11-16 11:02:01,968 INFO L226 Difference]: Without dead ends: 2077 [2022-11-16 11:02:01,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-11-16 11:02:01,968 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 348 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:01,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 2 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-16 11:02:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-11-16 11:02:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1125. [2022-11-16 11:02:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1111 states have (on average 3.4275427542754278) internal successors, (3808), 1124 states have internal predecessors, (3808), 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) [2022-11-16 11:02:02,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 3808 transitions. [2022-11-16 11:02:02,009 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 3808 transitions. Word has length 15 [2022-11-16 11:02:02,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:02,010 INFO L495 AbstractCegarLoop]: Abstraction has 1125 states and 3808 transitions. [2022-11-16 11:02:02,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 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) [2022-11-16 11:02:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 3808 transitions. [2022-11-16 11:02:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:02:02,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:02,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:02,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:02,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:02,227 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:02:02,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:02,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1899056575, now seen corresponding path program 1 times [2022-11-16 11:02:02,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:02,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [909060060] [2022-11-16 11:02:02,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:02:02,228 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 [2022-11-16 11:02:02,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:02,228 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:02:02,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-16 11:02:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:02:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:02:02,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:03,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:04,830 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:04,831 INFO L350 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 420 treesize of output 411 [2022-11-16 11:02:04,926 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:04,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 217 [2022-11-16 11:02:05,049 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:05,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 211 [2022-11-16 11:02:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:07,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [909060060] [2022-11-16 11:02:07,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [909060060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:02:07,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:02:07,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-16 11:02:07,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208375347] [2022-11-16 11:02:07,818 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:02:07,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:02:07,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:07,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:02:07,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:02:07,819 INFO L87 Difference]: Start difference. First operand 1125 states and 3808 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 11:02:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:12,495 INFO L93 Difference]: Finished difference Result 1208 states and 3940 transitions. [2022-11-16 11:02:12,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 11:02:12,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 [2022-11-16 11:02:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:12,499 INFO L225 Difference]: With dead ends: 1208 [2022-11-16 11:02:12,499 INFO L226 Difference]: Without dead ends: 1190 [2022-11-16 11:02:12,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:02:12,500 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 152 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:12,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 0 Unknown, 84 Unchecked, 2.2s Time] [2022-11-16 11:02:12,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2022-11-16 11:02:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1126. [2022-11-16 11:02:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1112 states have (on average 3.4244604316546763) internal successors, (3808), 1125 states have internal predecessors, (3808), 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) [2022-11-16 11:02:12,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 3808 transitions. [2022-11-16 11:02:12,524 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 3808 transitions. Word has length 16 [2022-11-16 11:02:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:12,524 INFO L495 AbstractCegarLoop]: Abstraction has 1126 states and 3808 transitions. [2022-11-16 11:02:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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) [2022-11-16 11:02:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 3808 transitions. [2022-11-16 11:02:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:02:12,525 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:12,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:12,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-16 11:02:12,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:12,726 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:02:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1854880333, now seen corresponding path program 2 times [2022-11-16 11:02:12,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:12,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224938478] [2022-11-16 11:02:12,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:02:12,727 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 [2022-11-16 11:02:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:12,729 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:02:12,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 11:02:13,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:02:13,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:02:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:02:13,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:13,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:13,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:13,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224938478] [2022-11-16 11:02:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224938478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:13,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:13,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:02:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012342769] [2022-11-16 11:02:13,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:02:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:02:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:02:13,540 INFO L87 Difference]: Start difference. First operand 1126 states and 3808 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-16 11:02:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:14,662 INFO L93 Difference]: Finished difference Result 1158 states and 3851 transitions. [2022-11-16 11:02:14,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:02:14,664 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 [2022-11-16 11:02:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:14,667 INFO L225 Difference]: With dead ends: 1158 [2022-11-16 11:02:14,667 INFO L226 Difference]: Without dead ends: 1149 [2022-11-16 11:02:14,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:14,667 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:14,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 7 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 197 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-11-16 11:02:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-11-16 11:02:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1128. [2022-11-16 11:02:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1114 states have (on average 3.421005385996409) internal successors, (3811), 1127 states have internal predecessors, (3811), 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) [2022-11-16 11:02:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3811 transitions. [2022-11-16 11:02:14,690 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3811 transitions. Word has length 16 [2022-11-16 11:02:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:14,691 INFO L495 AbstractCegarLoop]: Abstraction has 1128 states and 3811 transitions. [2022-11-16 11:02:14,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-16 11:02:14,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3811 transitions. [2022-11-16 11:02:14,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:02:14,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:14,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:14,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-16 11:02:14,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:14,893 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:02:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1885974363, now seen corresponding path program 3 times [2022-11-16 11:02:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:14,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1782934564] [2022-11-16 11:02:14,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:02:14,893 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 [2022-11-16 11:02:14,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:14,894 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:02:14,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 11:02:15,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 11:02:15,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:02:15,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:02:15,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:02:15,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:02:15,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:02:15,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1782934564] [2022-11-16 11:02:15,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1782934564] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:02:15,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:02:15,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:02:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200307684] [2022-11-16 11:02:15,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:02:15,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:02:15,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:02:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:02:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:02:15,638 INFO L87 Difference]: Start difference. First operand 1128 states and 3811 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-16 11:02:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:02:16,472 INFO L93 Difference]: Finished difference Result 1153 states and 3841 transitions. [2022-11-16 11:02:16,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:02:16,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 [2022-11-16 11:02:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:02:16,477 INFO L225 Difference]: With dead ends: 1153 [2022-11-16 11:02:16,477 INFO L226 Difference]: Without dead ends: 1146 [2022-11-16 11:02:16,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:02:16,477 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:02:16,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 4 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 50 Unchecked, 0.6s Time] [2022-11-16 11:02:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2022-11-16 11:02:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 1127. [2022-11-16 11:02:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1113 states have (on average 3.420485175202156) internal successors, (3807), 1126 states have internal predecessors, (3807), 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) [2022-11-16 11:02:16,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3807 transitions. [2022-11-16 11:02:16,528 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3807 transitions. Word has length 16 [2022-11-16 11:02:16,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:02:16,528 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3807 transitions. [2022-11-16 11:02:16,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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) [2022-11-16 11:02:16,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3807 transitions. [2022-11-16 11:02:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:02:16,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:02:16,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:02:16,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-16 11:02:16,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:02:16,746 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2022-11-16 11:02:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:02:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -736609407, now seen corresponding path program 4 times [2022-11-16 11:02:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:02:16,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545210121] [2022-11-16 11:02:16,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:02:16,747 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 [2022-11-16 11:02:16,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:02:16,748 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -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) [2022-11-16 11:02:16,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0667f8b8-693b-4b50-b2b0-887030ec52a7/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-16 11:02:17,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:02:17,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:02:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:02:17,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:02:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:02:17,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:02:18,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:18,771 INFO L350 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 420 treesize of output 411 [2022-11-16 11:02:18,854 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:18,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 217 [2022-11-16 11:02:18,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:02:18,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 211