./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro --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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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-8393723 [2022-11-18 20:48:29,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:48:29,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:48:29,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:48:29,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:48:29,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:48:29,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:48:29,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:48:29,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:48:29,717 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:48:29,719 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:48:29,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:48:29,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:48:29,734 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:48:29,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:48:29,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:48:29,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:48:29,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:48:29,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:48:29,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:48:29,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:48:29,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:48:29,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:48:29,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:48:29,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:48:29,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:48:29,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:48:29,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:48:29,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:48:29,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:48:29,785 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:48:29,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:48:29,788 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:48:29,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:48:29,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:48:29,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:48:29,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:48:29,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:48:29,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:48:29,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:48:29,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:48:29,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:48:29,858 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:48:29,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:48:29,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:48:29,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:48:29,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:48:29,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:48:29,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:48:29,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:48:29,864 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:48:29,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:48:29,866 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:48:29,867 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:48:29,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:48:29,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:48:29,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:48:29,868 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:48:29,868 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:48:29,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:48:29,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:48:29,869 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:48:29,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:48:29,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:48:29,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:48:29,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:48:29,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:48:29,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:48:29,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:48:29,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:48:29,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:48:29,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:48:29,874 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-18 20:48:30,189 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:48:30,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:48:30,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:48:30,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:48:30,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:48:30,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-18 20:48:30,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/1ab61c180/74ce7e3c4b1546f09a913ed01467c937/FLAG480168a17 [2022-11-18 20:48:31,018 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:48:31,019 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-18 20:48:31,039 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/1ab61c180/74ce7e3c4b1546f09a913ed01467c937/FLAG480168a17 [2022-11-18 20:48:31,358 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/1ab61c180/74ce7e3c4b1546f09a913ed01467c937 [2022-11-18 20:48:31,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:48:31,368 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:48:31,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:48:31,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:48:31,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:48:31,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:48:31" (1/1) ... [2022-11-18 20:48:31,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b6ae4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:31, skipping insertion in model container [2022-11-18 20:48:31,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:48:31" (1/1) ... [2022-11-18 20:48:31,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:48:31,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:48:31,777 WARN L234 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-18 20:48:31,811 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:48:31,831 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) [2022-11-18 20:48:31,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2afd4606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:31, skipping insertion in model container [2022-11-18 20:48:31,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:48:31,835 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-18 20:48:31,838 INFO L158 Benchmark]: Toolchain (without parser) took 468.24ms. Allocated memory is still 98.6MB. Free memory was 63.4MB in the beginning and 74.3MB in the end (delta: -10.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:48:31,840 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 70.5MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:48:31,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 464.00ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 74.3MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-18 20:48:31,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 98.6MB. Free memory was 70.5MB in the beginning and 70.5MB in the end (delta: 25.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 464.00ms. Allocated memory is still 98.6MB. Free memory was 63.1MB in the beginning and 74.3MB in the end (delta: -11.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 100]: 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro --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 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f --- 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-8393723 [2022-11-18 20:48:34,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:48:34,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:48:34,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:48:34,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:48:34,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:48:34,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:48:34,466 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:48:34,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:48:34,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:48:34,476 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:48:34,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:48:34,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:48:34,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:48:34,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:48:34,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:48:34,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:48:34,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:48:34,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:48:34,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:48:34,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:48:34,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:48:34,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:48:34,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:48:34,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:48:34,530 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:48:34,530 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:48:34,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:48:34,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:48:34,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:48:34,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:48:34,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:48:34,538 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:48:34,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:48:34,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:48:34,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:48:34,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:48:34,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:48:34,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:48:34,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:48:34,551 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:48:34,552 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-18 20:48:34,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:48:34,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:48:34,610 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:48:34,610 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:48:34,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:48:34,612 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:48:34,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:48:34,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:48:34,614 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:48:34,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:48:34,616 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:48:34,616 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:48:34,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:48:34,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:48:34,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:48:34,617 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:48:34,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:48:34,618 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:48:34,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:48:34,618 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:48:34,619 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:48:34,619 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:48:34,619 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:48:34,619 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:48:34,620 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:48:34,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:48:34,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:48:34,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:48:34,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:48:34,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:48:34,621 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:48:34,622 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:48:34,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:48:34,623 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6727abf6d3311127e7c3f388ca276994a5a41bcb1f2faca3217c66ebe13b8b8f [2022-11-18 20:48:35,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:48:35,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:48:35,167 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:48:35,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:48:35,170 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:48:35,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-18 20:48:35,257 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/512cbe794/06042fb2a20e42e69dc8277033edc4a8/FLAG3b43ae9b8 [2022-11-18 20:48:35,941 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:48:35,944 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2022-11-18 20:48:35,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/512cbe794/06042fb2a20e42e69dc8277033edc4a8/FLAG3b43ae9b8 [2022-11-18 20:48:36,238 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/data/512cbe794/06042fb2a20e42e69dc8277033edc4a8 [2022-11-18 20:48:36,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:48:36,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:48:36,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:48:36,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:48:36,255 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:48:36,256 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36a6e9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36, skipping insertion in model container [2022-11-18 20:48:36,258 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:48:36,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:48:36,506 WARN L234 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-18 20:48:36,525 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:48:36,562 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-18 20:48:36,587 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:48:36,619 WARN L234 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-18 20:48:36,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:48:36,641 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:48:36,685 WARN L234 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_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c[2412,2425] [2022-11-18 20:48:36,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:48:36,730 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:48:36,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36 WrapperNode [2022-11-18 20:48:36,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:48:36,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:48:36,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:48:36,732 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:48:36,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,826 INFO L138 Inliner]: procedures = 28, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 262 [2022-11-18 20:48:36,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:48:36,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:48:36,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:48:36,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:48:36,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,894 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:48:36,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:48:36,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:48:36,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:48:36,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (1/1) ... [2022-11-18 20:48:36,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:48:36,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:36,957 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:48:36,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:48:37,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:48:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:48:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:48:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-18 20:48:37,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:48:37,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:48:37,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:48:37,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:48:37,039 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 20:48:37,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 20:48:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:48:37,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:48:37,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:48:37,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:48:37,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-18 20:48:37,043 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:48:37,240 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:48:37,243 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:48:38,340 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:48:38,356 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:48:38,357 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 20:48:38,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:48:38 BoogieIcfgContainer [2022-11-18 20:48:38,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:48:38,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:48:38,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:48:38,367 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:48:38,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:48:36" (1/3) ... [2022-11-18 20:48:38,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c32785f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:48:38, skipping insertion in model container [2022-11-18 20:48:38,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:48:36" (2/3) ... [2022-11-18 20:48:38,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c32785f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:48:38, skipping insertion in model container [2022-11-18 20:48:38,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:48:38" (3/3) ... [2022-11-18 20:48:38,371 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2022-11-18 20:48:38,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:48:38,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-18 20:48:38,396 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:48:38,625 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 20:48:38,676 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:48:38,696 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-18 20:48:38,700 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 374 places, 393 transitions, 810 flow [2022-11-18 20:48:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 374 places, 393 transitions, 810 flow [2022-11-18 20:48:38,994 INFO L130 PetriNetUnfolder]: 29/390 cut-off events. [2022-11-18 20:48:38,995 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:48:39,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 390 events. 29/390 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 654 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 250. Up to 2 conditions per place. [2022-11-18 20:48:39,032 INFO L119 LiptonReduction]: Number of co-enabled transitions 20950 [2022-11-18 20:49:59,907 INFO L134 LiptonReduction]: Checked pairs total: 21781 [2022-11-18 20:49:59,908 INFO L136 LiptonReduction]: Total number of compositions: 466 [2022-11-18 20:49:59,918 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 67 places, 63 transitions, 150 flow [2022-11-18 20:50:00,054 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:00,073 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:00,081 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;@1d3863ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:00,081 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2022-11-18 20:50:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:00,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:50:00,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:00,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:50:00,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash 49928, now seen corresponding path program 1 times [2022-11-18 20:50:00,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:00,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568253300] [2022-11-18 20:50:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:00,119 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 [2022-11-18 20:50:00,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:00,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:00,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:50:00,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:00,553 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:50:00,554 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:50:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:00,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:00,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:00,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568253300] [2022-11-18 20:50:00,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568253300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:50:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69908368] [2022-11-18 20:50:00,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:00,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:00,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:00,670 INFO L87 Difference]: Start difference. First operand has 1500 states, 1152 states have (on average 4.541666666666667) internal successors, (5232), 1499 states have internal predecessors, (5232), 0 states have call successors, (0), 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) [2022-11-18 20:50:01,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:01,172 INFO L93 Difference]: Finished difference Result 1248 states and 4342 transitions. [2022-11-18 20:50:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:01,179 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 [2022-11-18 20:50:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:01,230 INFO L225 Difference]: With dead ends: 1248 [2022-11-18 20:50:01,232 INFO L226 Difference]: Without dead ends: 1248 [2022-11-18 20:50:01,233 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 [2022-11-18 20:50:01,242 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:01,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:50:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-11-18 20:50:01,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1248. [2022-11-18 20:50:01,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 974 states have (on average 4.457905544147844) internal successors, (4342), 1247 states have internal predecessors, (4342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:01,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 4342 transitions. [2022-11-18 20:50:01,416 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 4342 transitions. Word has length 2 [2022-11-18 20:50:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:01,417 INFO L495 AbstractCegarLoop]: Abstraction has 1248 states and 4342 transitions. [2022-11-18 20:50:01,417 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) [2022-11-18 20:50:01,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 4342 transitions. [2022-11-18 20:50:01,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:50:01,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:01,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:50:01,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-18 20:50:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:01,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:01,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:01,640 INFO L85 PathProgramCache]: Analyzing trace with hash 49929, now seen corresponding path program 1 times [2022-11-18 20:50:01,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1925093950] [2022-11-18 20:50:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:01,641 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 [2022-11-18 20:50:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:01,645 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:01,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:01,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:50:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:02,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:50:02,004 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:50:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:02,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:02,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:02,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1925093950] [2022-11-18 20:50:02,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1925093950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:02,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:02,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:50:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765016877] [2022-11-18 20:50:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:02,054 INFO L87 Difference]: Start difference. First operand 1248 states and 4342 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) [2022-11-18 20:50:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:02,914 INFO L93 Difference]: Finished difference Result 2492 states and 8680 transitions. [2022-11-18 20:50:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:02,916 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 [2022-11-18 20:50:02,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:02,940 INFO L225 Difference]: With dead ends: 2492 [2022-11-18 20:50:02,941 INFO L226 Difference]: Without dead ends: 2492 [2022-11-18 20:50:02,942 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 [2022-11-18 20:50:02,947 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:02,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:50:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2022-11-18 20:50:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 1251. [2022-11-18 20:50:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 977 states have (on average 4.452405322415558) internal successors, (4350), 1250 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 4350 transitions. [2022-11-18 20:50:03,039 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 4350 transitions. Word has length 2 [2022-11-18 20:50:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:03,039 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 4350 transitions. [2022-11-18 20:50:03,040 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) [2022-11-18 20:50:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 4350 transitions. [2022-11-18 20:50:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:50:03,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:03,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:50:03,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:03,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:03,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:03,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1554452, now seen corresponding path program 1 times [2022-11-18 20:50:03,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:03,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579067552] [2022-11-18 20:50:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:03,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:03,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:03,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:03,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:50:03,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:03,566 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:50:03,567 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:50:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:03,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:04,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:04,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579067552] [2022-11-18 20:50:04,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579067552] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:04,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:04,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2022-11-18 20:50:04,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183679293] [2022-11-18 20:50:04,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:04,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:50:04,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:04,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:50:04,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:50:04,010 INFO L87 Difference]: Start difference. First operand 1251 states and 4350 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) [2022-11-18 20:50:06,550 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 [] [2022-11-18 20:50:08,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:08,945 INFO L93 Difference]: Finished difference Result 3741 states and 13032 transitions. [2022-11-18 20:50:08,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:50:08,947 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 [2022-11-18 20:50:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:08,984 INFO L225 Difference]: With dead ends: 3741 [2022-11-18 20:50:08,984 INFO L226 Difference]: Without dead ends: 3741 [2022-11-18 20:50:08,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:50:08,994 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 179 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 33 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:08,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 12 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-11-18 20:50:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3741 states. [2022-11-18 20:50:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3741 to 1259. [2022-11-18 20:50:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 985 states have (on average 4.438578680203046) internal successors, (4372), 1258 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:09,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 4372 transitions. [2022-11-18 20:50:09,133 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 4372 transitions. Word has length 3 [2022-11-18 20:50:09,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:09,134 INFO L495 AbstractCegarLoop]: Abstraction has 1259 states and 4372 transitions. [2022-11-18 20:50:09,134 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) [2022-11-18 20:50:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 4372 transitions. [2022-11-18 20:50:09,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 20:50:09,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:09,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 20:50:09,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:09,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 48295142, now seen corresponding path program 1 times [2022-11-18 20:50:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:09,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148922964] [2022-11-18 20:50:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:09,351 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 [2022-11-18 20:50:09,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:09,352 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:09,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:50:09,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:09,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,658 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-18 20:50:09,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-18 20:50:09,705 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-18 20:50:09,706 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 23 treesize of output 19 [2022-11-18 20:50:09,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,784 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 [2022-11-18 20:50:09,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:09,834 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 [2022-11-18 20:50:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:09,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:09,897 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:09,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148922964] [2022-11-18 20:50:09,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148922964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:09,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:09,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:09,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963838586] [2022-11-18 20:50:09,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:09,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:09,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:09,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:09,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:09,899 INFO L87 Difference]: Start difference. First operand 1259 states and 4372 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-18 20:50:10,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:10,344 INFO L93 Difference]: Finished difference Result 1033 states and 3467 transitions. [2022-11-18 20:50:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:10,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 [2022-11-18 20:50:10,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:10,356 INFO L225 Difference]: With dead ends: 1033 [2022-11-18 20:50:10,356 INFO L226 Difference]: Without dead ends: 1033 [2022-11-18 20:50:10,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:10,358 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:10,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2022-11-18 20:50:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-11-18 20:50:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1033. [2022-11-18 20:50:10,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 823 states have (on average 4.212636695018226) internal successors, (3467), 1032 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:10,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 3467 transitions. [2022-11-18 20:50:10,404 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 3467 transitions. Word has length 4 [2022-11-18 20:50:10,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:10,405 INFO L495 AbstractCegarLoop]: Abstraction has 1033 states and 3467 transitions. [2022-11-18 20:50:10,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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) [2022-11-18 20:50:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 3467 transitions. [2022-11-18 20:50:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 20:50:10,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:10,406 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-18 20:50:10,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:10,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:10,621 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:10,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:10,621 INFO L85 PathProgramCache]: Analyzing trace with hash 48295143, now seen corresponding path program 1 times [2022-11-18 20:50:10,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:10,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495888279] [2022-11-18 20:50:10,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:10,622 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 [2022-11-18 20:50:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:10,624 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:10,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:50:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:10,935 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-18 20:50:10,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-18 20:50:11,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:11,422 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:50:11,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 20:50:11,944 INFO L321 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-11-18 20:50:11,952 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 3 case distinctions, treesize of input 55 treesize of output 80 [2022-11-18 20:50:14,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:14,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:14,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:14,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495888279] [2022-11-18 20:50:14,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495888279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:14,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:14,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:14,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556487177] [2022-11-18 20:50:14,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:14,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:50:14,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:50:14,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 20:50:14,568 INFO L87 Difference]: Start difference. First operand 1033 states and 3467 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-18 20:50:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:14,883 INFO L93 Difference]: Finished difference Result 1035 states and 3471 transitions. [2022-11-18 20:50:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:14,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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 [2022-11-18 20:50:14,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:14,895 INFO L225 Difference]: With dead ends: 1035 [2022-11-18 20:50:14,895 INFO L226 Difference]: Without dead ends: 1035 [2022-11-18 20:50:14,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=10, Invalid=9, Unknown=1, NotChecked=0, Total=20 [2022-11-18 20:50:14,896 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:14,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-11-18 20:50:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-18 20:50:14,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 1035. [2022-11-18 20:50:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 825 states have (on average 4.207272727272727) internal successors, (3471), 1034 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 3471 transitions. [2022-11-18 20:50:14,940 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 3471 transitions. Word has length 4 [2022-11-18 20:50:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:14,941 INFO L495 AbstractCegarLoop]: Abstraction has 1035 states and 3471 transitions. [2022-11-18 20:50:14,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 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) [2022-11-18 20:50:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 3471 transitions. [2022-11-18 20:50:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:50:14,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:14,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:50:14,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:15,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:15,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1494141746, now seen corresponding path program 1 times [2022-11-18 20:50:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:15,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358884099] [2022-11-18 20:50:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:15,160 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 [2022-11-18 20:50:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:15,161 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:15,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:15,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:50:15,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:15,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:15,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358884099] [2022-11-18 20:50:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358884099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:15,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:15,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-18 20:50:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660236537] [2022-11-18 20:50:15,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:50:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:50:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:50:15,507 INFO L87 Difference]: Start difference. First operand 1035 states and 3471 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2022-11-18 20:50:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:17,425 INFO L93 Difference]: Finished difference Result 4085 states and 13768 transitions. [2022-11-18 20:50:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:50:17,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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 5 [2022-11-18 20:50:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:17,473 INFO L225 Difference]: With dead ends: 4085 [2022-11-18 20:50:17,473 INFO L226 Difference]: Without dead ends: 4085 [2022-11-18 20:50:17,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:50:17,476 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 211 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:17,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 21 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:50:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2022-11-18 20:50:17,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 1038. [2022-11-18 20:50:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 828 states have (on average 4.1980676328502415) internal successors, (3476), 1037 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:17,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 3476 transitions. [2022-11-18 20:50:17,558 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 3476 transitions. Word has length 5 [2022-11-18 20:50:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 3476 transitions. [2022-11-18 20:50:17,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 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) [2022-11-18 20:50:17,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 3476 transitions. [2022-11-18 20:50:17,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:50:17,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:17,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:50:17,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:17,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:17,774 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:17,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1497148963, now seen corresponding path program 1 times [2022-11-18 20:50:17,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:17,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694732008] [2022-11-18 20:50:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:17,776 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 [2022-11-18 20:50:17,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:17,777 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:17,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:50:17,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:18,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:18,013 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:18,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694732008] [2022-11-18 20:50:18,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [694732008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:18,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:18,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:50:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576610039] [2022-11-18 20:50:18,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:18,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:50:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:50:18,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:18,015 INFO L87 Difference]: Start difference. First operand 1038 states and 3476 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:19,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:19,089 INFO L93 Difference]: Finished difference Result 2054 states and 6906 transitions. [2022-11-18 20:50:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:50:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:50:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:19,104 INFO L225 Difference]: With dead ends: 2054 [2022-11-18 20:50:19,105 INFO L226 Difference]: Without dead ends: 2054 [2022-11-18 20:50:19,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:50:19,106 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:19,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 12 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:50:19,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2022-11-18 20:50:19,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1039. [2022-11-18 20:50:19,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 829 states have (on average 4.193003618817853) internal successors, (3476), 1038 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:19,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3476 transitions. [2022-11-18 20:50:19,159 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3476 transitions. Word has length 5 [2022-11-18 20:50:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:19,160 INFO L495 AbstractCegarLoop]: Abstraction has 1039 states and 3476 transitions. [2022-11-18 20:50:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:19,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3476 transitions. [2022-11-18 20:50:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:50:19,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:19,161 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-18 20:50:19,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:19,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:19,375 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:19,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:19,376 INFO L85 PathProgramCache]: Analyzing trace with hash -929354295, now seen corresponding path program 2 times [2022-11-18 20:50:19,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:19,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911275272] [2022-11-18 20:50:19,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:50:19,377 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 [2022-11-18 20:50:19,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:19,378 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:19,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:19,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:50:19,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:19,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:50:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:19,705 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:50:19,705 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:50:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:19,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:20,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:20,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911275272] [2022-11-18 20:50:20,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911275272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:20,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:20,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:50:20,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861707548] [2022-11-18 20:50:20,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:20,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:50:20,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:20,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:50:20,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:50:20,834 INFO L87 Difference]: Start difference. First operand 1039 states and 3476 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) [2022-11-18 20:50:25,491 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 [] [2022-11-18 20:50:27,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:29,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:31,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:34,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:36,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:38,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:50:40,111 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 [] [2022-11-18 20:50:44,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:44,193 INFO L93 Difference]: Finished difference Result 7139 states and 24077 transitions. [2022-11-18 20:50:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:50:44,196 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 [2022-11-18 20:50:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:44,241 INFO L225 Difference]: With dead ends: 7139 [2022-11-18 20:50:44,242 INFO L226 Difference]: Without dead ends: 7139 [2022-11-18 20:50:44,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:50:44,243 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1132 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 132 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:44,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1132 Valid, 87 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1297 Invalid, 8 Unknown, 0 Unchecked, 21.7s Time] [2022-11-18 20:50:44,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2022-11-18 20:50:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 1049. [2022-11-18 20:50:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 839 states have (on average 4.1680572109654355) internal successors, (3497), 1048 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3497 transitions. [2022-11-18 20:50:44,377 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3497 transitions. Word has length 6 [2022-11-18 20:50:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:44,377 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 3497 transitions. [2022-11-18 20:50:44,377 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) [2022-11-18 20:50:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3497 transitions. [2022-11-18 20:50:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:50:44,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:44,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:50:44,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:44,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:44,593 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:44,594 INFO L85 PathProgramCache]: Analyzing trace with hash -832972211, now seen corresponding path program 1 times [2022-11-18 20:50:44,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:44,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350756117] [2022-11-18 20:50:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:44,594 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 [2022-11-18 20:50:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:44,596 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:44,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:50:44,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:44,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:44,898 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-18 20:50:44,898 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-18 20:50:45,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:45,280 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-18 20:50:45,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 36 [2022-11-18 20:50:45,555 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-18 20:50:45,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-18 20:50:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:45,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:45,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:45,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350756117] [2022-11-18 20:50:45,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350756117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:45,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:45,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:45,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634163861] [2022-11-18 20:50:45,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:45,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:45,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:45,840 INFO L87 Difference]: Start difference. First operand 1049 states and 3497 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) [2022-11-18 20:50:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:46,131 INFO L93 Difference]: Finished difference Result 1052 states and 3507 transitions. [2022-11-18 20:50:46,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:50:46,133 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 [2022-11-18 20:50:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:46,139 INFO L225 Difference]: With dead ends: 1052 [2022-11-18 20:50:46,139 INFO L226 Difference]: Without dead ends: 1052 [2022-11-18 20:50:46,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:46,144 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:46,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 9 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 48 Unchecked, 0.3s Time] [2022-11-18 20:50:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-11-18 20:50:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1052. [2022-11-18 20:50:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 842 states have (on average 4.165083135391924) internal successors, (3507), 1051 states have internal predecessors, (3507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3507 transitions. [2022-11-18 20:50:46,182 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3507 transitions. Word has length 6 [2022-11-18 20:50:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:46,183 INFO L495 AbstractCegarLoop]: Abstraction has 1052 states and 3507 transitions. [2022-11-18 20:50:46,183 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) [2022-11-18 20:50:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3507 transitions. [2022-11-18 20:50:46,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:50:46,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:46,184 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:50:46,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:46,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:46,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash -832972210, now seen corresponding path program 1 times [2022-11-18 20:50:46,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:46,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417987187] [2022-11-18 20:50:46,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:46,400 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 [2022-11-18 20:50:46,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:46,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:46,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:46,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:50:46,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:46,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:46,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:46,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:46,785 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 20:50:46,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 20:50:46,813 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 [2022-11-18 20:50:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:46,890 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 [2022-11-18 20:50:46,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:46,934 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 [2022-11-18 20:50:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:47,010 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:47,010 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:47,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417987187] [2022-11-18 20:50:47,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417987187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:47,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:47,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:47,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483234800] [2022-11-18 20:50:47,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:47,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:47,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:47,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:47,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:47,012 INFO L87 Difference]: Start difference. First operand 1052 states and 3507 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) [2022-11-18 20:50:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:47,368 INFO L93 Difference]: Finished difference Result 1002 states and 3360 transitions. [2022-11-18 20:50:47,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:47,369 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 [2022-11-18 20:50:47,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:47,374 INFO L225 Difference]: With dead ends: 1002 [2022-11-18 20:50:47,374 INFO L226 Difference]: Without dead ends: 1002 [2022-11-18 20:50:47,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:47,375 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:47,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-11-18 20:50:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-18 20:50:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1002. [2022-11-18 20:50:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 816 states have (on average 4.117647058823529) internal successors, (3360), 1001 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3360 transitions. [2022-11-18 20:50:47,424 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3360 transitions. Word has length 6 [2022-11-18 20:50:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:47,424 INFO L495 AbstractCegarLoop]: Abstraction has 1002 states and 3360 transitions. [2022-11-18 20:50:47,424 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) [2022-11-18 20:50:47,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3360 transitions. [2022-11-18 20:50:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:50:47,425 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:47,425 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:47,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:47,626 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1348407333, now seen corresponding path program 1 times [2022-11-18 20:50:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784191083] [2022-11-18 20:50:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:47,627 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 [2022-11-18 20:50:47,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:47,629 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:47,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:50:47,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:47,985 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-18 20:50:47,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-18 20:50:48,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:48,091 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 20 [2022-11-18 20:50:48,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:48,139 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 20 [2022-11-18 20:50:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:50:48,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:48,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784191083] [2022-11-18 20:50:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784191083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:48,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:48,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:48,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345253921] [2022-11-18 20:50:48,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:48,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:48,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:48,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:48,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:48,209 INFO L87 Difference]: Start difference. First operand 1002 states and 3360 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) [2022-11-18 20:50:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:48,639 INFO L93 Difference]: Finished difference Result 1001 states and 3352 transitions. [2022-11-18 20:50:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:48,640 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 [2022-11-18 20:50:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:48,643 INFO L225 Difference]: With dead ends: 1001 [2022-11-18 20:50:48,643 INFO L226 Difference]: Without dead ends: 1001 [2022-11-18 20:50:48,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:48,647 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:48,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-18 20:50:48,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-11-18 20:50:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 1001. [2022-11-18 20:50:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 816 states have (on average 4.107843137254902) internal successors, (3352), 1000 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:48,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3352 transitions. [2022-11-18 20:50:48,681 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3352 transitions. Word has length 7 [2022-11-18 20:50:48,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:48,682 INFO L495 AbstractCegarLoop]: Abstraction has 1001 states and 3352 transitions. [2022-11-18 20:50:48,682 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) [2022-11-18 20:50:48,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3352 transitions. [2022-11-18 20:50:48,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:50:48,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:48,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:48,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:48,899 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -52349683, now seen corresponding path program 1 times [2022-11-18 20:50:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047101182] [2022-11-18 20:50:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:48,901 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 [2022-11-18 20:50:48,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:48,902 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:48,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:50:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:49,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:49,130 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:49,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047101182] [2022-11-18 20:50:49,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047101182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:49,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:49,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:49,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813166629] [2022-11-18 20:50:49,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:49,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:50:49,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:50:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:49,132 INFO L87 Difference]: Start difference. First operand 1001 states and 3352 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-18 20:50:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:50,187 INFO L93 Difference]: Finished difference Result 1649 states and 5354 transitions. [2022-11-18 20:50:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:50,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 [2022-11-18 20:50:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:50,197 INFO L225 Difference]: With dead ends: 1649 [2022-11-18 20:50:50,197 INFO L226 Difference]: Without dead ends: 1649 [2022-11-18 20:50:50,197 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 [2022-11-18 20:50:50,198 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 95 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:50,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 13 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-18 20:50:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-11-18 20:50:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1318. [2022-11-18 20:50:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1133 states have (on average 3.947043248014122) internal successors, (4472), 1317 states have internal predecessors, (4472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:50,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4472 transitions. [2022-11-18 20:50:50,247 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4472 transitions. Word has length 7 [2022-11-18 20:50:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:50,248 INFO L495 AbstractCegarLoop]: Abstraction has 1318 states and 4472 transitions. [2022-11-18 20:50:50,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-18 20:50:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4472 transitions. [2022-11-18 20:50:50,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:50:50,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:50,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:50,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:50,464 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:50,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830684, now seen corresponding path program 1 times [2022-11-18 20:50:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:50,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138139010] [2022-11-18 20:50:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:50,465 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 [2022-11-18 20:50:50,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:50,466 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:50,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:50:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:50,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:50,789 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-18 20:50:50,790 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 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-18 20:50:50,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:50,912 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 20 [2022-11-18 20:50:50,967 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:50:50,968 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 [2022-11-18 20:50:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:51,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:51,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:51,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138139010] [2022-11-18 20:50:51,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138139010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:51,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:51,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:51,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529007393] [2022-11-18 20:50:51,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:51,055 INFO L87 Difference]: Start difference. First operand 1318 states and 4472 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) [2022-11-18 20:50:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:51,469 INFO L93 Difference]: Finished difference Result 1266 states and 4323 transitions. [2022-11-18 20:50:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:51,472 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 [2022-11-18 20:50:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:51,479 INFO L225 Difference]: With dead ends: 1266 [2022-11-18 20:50:51,479 INFO L226 Difference]: Without dead ends: 1266 [2022-11-18 20:50:51,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:51,480 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:51,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-18 20:50:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-11-18 20:50:51,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1262. [2022-11-18 20:50:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1101 states have (on average 3.9209809264305178) internal successors, (4317), 1261 states have internal predecessors, (4317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4317 transitions. [2022-11-18 20:50:51,545 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4317 transitions. Word has length 8 [2022-11-18 20:50:51,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:51,545 INFO L495 AbstractCegarLoop]: Abstraction has 1262 states and 4317 transitions. [2022-11-18 20:50:51,546 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) [2022-11-18 20:50:51,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4317 transitions. [2022-11-18 20:50:51,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:50:51,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:51,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:51,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:51,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:51,761 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:51,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341199, now seen corresponding path program 1 times [2022-11-18 20:50:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:51,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026665777] [2022-11-18 20:50:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:51,763 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 [2022-11-18 20:50:51,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:51,764 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:51,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:51,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:50:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:52,050 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:50:52,050 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:50:52,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:52,110 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 20 [2022-11-18 20:50:52,165 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:50:52,165 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 [2022-11-18 20:50:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:52,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:52,271 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:52,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026665777] [2022-11-18 20:50:52,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026665777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:52,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:52,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792645769] [2022-11-18 20:50:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:52,274 INFO L87 Difference]: Start difference. First operand 1262 states and 4317 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) [2022-11-18 20:50:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:52,608 INFO L93 Difference]: Finished difference Result 1271 states and 4348 transitions. [2022-11-18 20:50:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:52,610 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 [2022-11-18 20:50:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:52,615 INFO L225 Difference]: With dead ends: 1271 [2022-11-18 20:50:52,615 INFO L226 Difference]: Without dead ends: 1271 [2022-11-18 20:50:52,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:52,616 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:52,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-11-18 20:50:52,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2022-11-18 20:50:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1271. [2022-11-18 20:50:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 1110 states have (on average 3.917117117117117) internal successors, (4348), 1270 states have internal predecessors, (4348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:52,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 4348 transitions. [2022-11-18 20:50:52,656 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 4348 transitions. Word has length 8 [2022-11-18 20:50:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:52,658 INFO L495 AbstractCegarLoop]: Abstraction has 1271 states and 4348 transitions. [2022-11-18 20:50:52,658 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) [2022-11-18 20:50:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 4348 transitions. [2022-11-18 20:50:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:50:52,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:52,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:52,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:52,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:52,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1622341198, now seen corresponding path program 1 times [2022-11-18 20:50:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:52,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444575167] [2022-11-18 20:50:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:52,874 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 [2022-11-18 20:50:52,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:52,877 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:52,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:50:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:53,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:53,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:53,155 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 20:50:53,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-18 20:50:53,170 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 18 treesize of output 16 [2022-11-18 20:50:53,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:53,215 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 [2022-11-18 20:50:53,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:53,271 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 [2022-11-18 20:50:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:53,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:53,373 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444575167] [2022-11-18 20:50:53,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444575167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:53,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:53,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059616337] [2022-11-18 20:50:53,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:53,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:50:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:50:53,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:53,375 INFO L87 Difference]: Start difference. First operand 1271 states and 4348 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) [2022-11-18 20:50:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:53,758 INFO L93 Difference]: Finished difference Result 1848 states and 6162 transitions. [2022-11-18 20:50:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:50:53,760 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 [2022-11-18 20:50:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:53,770 INFO L225 Difference]: With dead ends: 1848 [2022-11-18 20:50:53,770 INFO L226 Difference]: Without dead ends: 1848 [2022-11-18 20:50:53,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:53,774 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:53,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 9 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 43 Unchecked, 0.4s Time] [2022-11-18 20:50:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-11-18 20:50:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1530. [2022-11-18 20:50:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1369 states have (on average 3.93791088385683) internal successors, (5391), 1529 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5391 transitions. [2022-11-18 20:50:53,849 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5391 transitions. Word has length 8 [2022-11-18 20:50:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:53,850 INFO L495 AbstractCegarLoop]: Abstraction has 1530 states and 5391 transitions. [2022-11-18 20:50:53,850 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) [2022-11-18 20:50:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5391 transitions. [2022-11-18 20:50:53,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:50:53,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:53,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:53,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:54,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:54,074 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:54,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1247016924, now seen corresponding path program 1 times [2022-11-18 20:50:54,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:54,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899954706] [2022-11-18 20:50:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:54,075 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 [2022-11-18 20:50:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:54,077 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:54,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:54,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:54,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:50:54,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:54,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:54,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:54,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899954706] [2022-11-18 20:50:54,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899954706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:54,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:54,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:54,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984035140] [2022-11-18 20:50:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:54,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:50:54,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:54,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:50:54,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:54,354 INFO L87 Difference]: Start difference. First operand 1530 states and 5391 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-18 20:50:55,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:55,516 INFO L93 Difference]: Finished difference Result 1585 states and 5044 transitions. [2022-11-18 20:50:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:55,518 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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 [2022-11-18 20:50:55,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:55,530 INFO L225 Difference]: With dead ends: 1585 [2022-11-18 20:50:55,530 INFO L226 Difference]: Without dead ends: 1585 [2022-11-18 20:50:55,530 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 [2022-11-18 20:50:55,532 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 85 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:55,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 13 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:50:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2022-11-18 20:50:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1498. [2022-11-18 20:50:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1498 states, 1337 states have (on average 3.6537023186237847) internal successors, (4885), 1497 states have internal predecessors, (4885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1498 states to 1498 states and 4885 transitions. [2022-11-18 20:50:55,585 INFO L78 Accepts]: Start accepts. Automaton has 1498 states and 4885 transitions. Word has length 9 [2022-11-18 20:50:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:55,586 INFO L495 AbstractCegarLoop]: Abstraction has 1498 states and 4885 transitions. [2022-11-18 20:50:55,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 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) [2022-11-18 20:50:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1498 states and 4885 transitions. [2022-11-18 20:50:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:50:55,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:55,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:55,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:55,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:55,800 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -425172721, now seen corresponding path program 1 times [2022-11-18 20:50:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:55,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724153113] [2022-11-18 20:50:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:55,802 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 [2022-11-18 20:50:55,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:55,803 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:55,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:56,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:50:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:56,238 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:50:56,238 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:50:56,293 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:50:56,294 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 [2022-11-18 20:50:56,321 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:50:56,322 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 [2022-11-18 20:50:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:50:56,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:56,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:56,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724153113] [2022-11-18 20:50:56,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724153113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:56,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:56,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:50:56,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908902399] [2022-11-18 20:50:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:56,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:50:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:50:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:50:56,358 INFO L87 Difference]: Start difference. First operand 1498 states and 4885 transitions. Second operand has 4 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) [2022-11-18 20:50:56,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:56,786 INFO L93 Difference]: Finished difference Result 1214 states and 3900 transitions. [2022-11-18 20:50:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:50:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-18 20:50:56,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:56,790 INFO L225 Difference]: With dead ends: 1214 [2022-11-18 20:50:56,790 INFO L226 Difference]: Without dead ends: 1214 [2022-11-18 20:50:56,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:50:56,792 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:56,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:50:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2022-11-18 20:50:56,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1214. [2022-11-18 20:50:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1115 states have (on average 3.497757847533632) internal successors, (3900), 1213 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3900 transitions. [2022-11-18 20:50:56,827 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3900 transitions. Word has length 10 [2022-11-18 20:50:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:56,828 INFO L495 AbstractCegarLoop]: Abstraction has 1214 states and 3900 transitions. [2022-11-18 20:50:56,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-18 20:50:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3900 transitions. [2022-11-18 20:50:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:50:56,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:56,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:56,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:57,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:57,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:50:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash -425172720, now seen corresponding path program 1 times [2022-11-18 20:50:57,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:57,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882890867] [2022-11-18 20:50:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:57,036 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 [2022-11-18 20:50:57,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:57,038 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:50:57,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:50:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:50:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:57,465 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:50:57,465 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:50:57,656 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:50:57,657 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:50:57,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:50:57,839 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 [2022-11-18 20:50:57,858 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:50:57,858 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 [2022-11-18 20:50:57,944 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:50:57,945 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 16 treesize of output 18 [2022-11-18 20:50:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:50:58,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:01,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:01,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:01,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882890867] [2022-11-18 20:51:01,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882890867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:01,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:01,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:51:01,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501622342] [2022-11-18 20:51:01,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:01,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:51:01,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:01,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:51:01,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:51:01,261 INFO L87 Difference]: Start difference. First operand 1214 states and 3900 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) [2022-11-18 20:51:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:03,416 INFO L93 Difference]: Finished difference Result 2808 states and 9762 transitions. [2022-11-18 20:51:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:51:03,417 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 [2022-11-18 20:51:03,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:03,426 INFO L225 Difference]: With dead ends: 2808 [2022-11-18 20:51:03,426 INFO L226 Difference]: Without dead ends: 2808 [2022-11-18 20:51:03,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:51:03,427 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 119 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:03,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 51 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 282 Invalid, 0 Unknown, 244 Unchecked, 1.8s Time] [2022-11-18 20:51:03,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2022-11-18 20:51:03,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 1521. [2022-11-18 20:51:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1422 states have (on average 3.582981715893108) internal successors, (5095), 1520 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5095 transitions. [2022-11-18 20:51:03,495 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5095 transitions. Word has length 10 [2022-11-18 20:51:03,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:03,496 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 5095 transitions. [2022-11-18 20:51:03,496 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) [2022-11-18 20:51:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5095 transitions. [2022-11-18 20:51:03,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:51:03,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:03,497 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-18 20:51:03,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:03,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:03,712 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:03,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1168509283, now seen corresponding path program 1 times [2022-11-18 20:51:03,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415536451] [2022-11-18 20:51:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:03,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:03,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:03,715 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:03,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:03,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:51:03,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:03,925 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 [2022-11-18 20:51:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:51:04,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:05,670 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415536451] [2022-11-18 20:51:05,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415536451] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:05,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:05,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 16 [2022-11-18 20:51:05,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407027662] [2022-11-18 20:51:05,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:05,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:51:05,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:05,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:51:05,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:51:05,672 INFO L87 Difference]: Start difference. First operand 1521 states and 5095 transitions. Second operand has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:12,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:12,649 INFO L93 Difference]: Finished difference Result 3873 states and 13101 transitions. [2022-11-18 20:51:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:51:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:51:12,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:12,663 INFO L225 Difference]: With dead ends: 3873 [2022-11-18 20:51:12,663 INFO L226 Difference]: Without dead ends: 3873 [2022-11-18 20:51:12,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:51:12,664 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 321 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:12,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 81 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 847 Invalid, 0 Unknown, 123 Unchecked, 6.0s Time] [2022-11-18 20:51:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2022-11-18 20:51:12,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 1521. [2022-11-18 20:51:12,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1422 states have (on average 3.5815752461322083) internal successors, (5093), 1520 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:12,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5093 transitions. [2022-11-18 20:51:12,736 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5093 transitions. Word has length 10 [2022-11-18 20:51:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:12,736 INFO L495 AbstractCegarLoop]: Abstraction has 1521 states and 5093 transitions. [2022-11-18 20:51:12,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5093 transitions. [2022-11-18 20:51:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:51:12,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:12,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:12,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:12,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:12,953 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash -465334900, now seen corresponding path program 1 times [2022-11-18 20:51:12,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:12,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317097446] [2022-11-18 20:51:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:12,955 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 [2022-11-18 20:51:12,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:12,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:13,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:13,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:51:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:13,279 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:51:13,279 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:51:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:13,341 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 20 [2022-11-18 20:51:13,393 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:51:13,393 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 [2022-11-18 20:51:13,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:13,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:13,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:13,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317097446] [2022-11-18 20:51:13,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317097446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:13,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:13,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:51:13,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102087965] [2022-11-18 20:51:13,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:13,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:51:13,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:51:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:51:13,503 INFO L87 Difference]: Start difference. First operand 1521 states and 5093 transitions. Second operand has 4 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) [2022-11-18 20:51:13,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:13,908 INFO L93 Difference]: Finished difference Result 1525 states and 5099 transitions. [2022-11-18 20:51:13,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:13,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-18 20:51:13,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:13,916 INFO L225 Difference]: With dead ends: 1525 [2022-11-18 20:51:13,916 INFO L226 Difference]: Without dead ends: 1525 [2022-11-18 20:51:13,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:13,917 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:13,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-18 20:51:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2022-11-18 20:51:13,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1525. [2022-11-18 20:51:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1426 states have (on average 3.5757363253856944) internal successors, (5099), 1524 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5099 transitions. [2022-11-18 20:51:13,962 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5099 transitions. Word has length 10 [2022-11-18 20:51:13,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:13,963 INFO L495 AbstractCegarLoop]: Abstraction has 1525 states and 5099 transitions. [2022-11-18 20:51:13,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-18 20:51:13,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5099 transitions. [2022-11-18 20:51:13,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:51:13,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:13,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:13,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:14,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:14,185 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 3272723, now seen corresponding path program 1 times [2022-11-18 20:51:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1432193736] [2022-11-18 20:51:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:14,185 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 [2022-11-18 20:51:14,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:14,186 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:14,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:51:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:14,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:14,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:14,345 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:14,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1432193736] [2022-11-18 20:51:14,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1432193736] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:14,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:14,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:51:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318223110] [2022-11-18 20:51:14,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:14,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:51:14,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:14,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:51:14,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:51:14,348 INFO L87 Difference]: Start difference. First operand 1525 states and 5099 transitions. Second operand has 3 states, 2 states have (on average 5.0) 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) [2022-11-18 20:51:14,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:14,648 INFO L93 Difference]: Finished difference Result 1221 states and 3803 transitions. [2022-11-18 20:51:14,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:51:14,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) 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 [2022-11-18 20:51:14,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:14,653 INFO L225 Difference]: With dead ends: 1221 [2022-11-18 20:51:14,653 INFO L226 Difference]: Without dead ends: 1221 [2022-11-18 20:51:14,654 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 [2022-11-18 20:51:14,654 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:14,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:51:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-11-18 20:51:14,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2022-11-18 20:51:14,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1158 states have (on average 3.284110535405872) internal successors, (3803), 1220 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3803 transitions. [2022-11-18 20:51:14,686 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3803 transitions. Word has length 10 [2022-11-18 20:51:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:14,687 INFO L495 AbstractCegarLoop]: Abstraction has 1221 states and 3803 transitions. [2022-11-18 20:51:14,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) 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) [2022-11-18 20:51:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3803 transitions. [2022-11-18 20:51:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:51:14,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:14,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:14,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:14,901 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2826511, now seen corresponding path program 1 times [2022-11-18 20:51:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762366637] [2022-11-18 20:51:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:14,902 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 [2022-11-18 20:51:14,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:14,902 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:51:15,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:15,151 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:51:15,152 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:51:15,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:15,212 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 20 [2022-11-18 20:51:15,261 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:51:15,261 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 [2022-11-18 20:51:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:15,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:15,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:15,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762366637] [2022-11-18 20:51:15,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762366637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:15,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:15,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:51:15,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854283028] [2022-11-18 20:51:15,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:15,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:51:15,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:15,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:51:15,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:51:15,365 INFO L87 Difference]: Start difference. First operand 1221 states and 3803 transitions. Second operand has 4 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) [2022-11-18 20:51:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:15,763 INFO L93 Difference]: Finished difference Result 1229 states and 3817 transitions. [2022-11-18 20:51:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:15,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2022-11-18 20:51:15,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:15,769 INFO L225 Difference]: With dead ends: 1229 [2022-11-18 20:51:15,769 INFO L226 Difference]: Without dead ends: 1229 [2022-11-18 20:51:15,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:15,770 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:15,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 41 Unchecked, 0.4s Time] [2022-11-18 20:51:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-11-18 20:51:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1223. [2022-11-18 20:51:15,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1223 states, 1160 states have (on average 3.281896551724138) internal successors, (3807), 1222 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) [2022-11-18 20:51:15,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1223 states to 1223 states and 3807 transitions. [2022-11-18 20:51:15,832 INFO L78 Accepts]: Start accepts. Automaton has 1223 states and 3807 transitions. Word has length 10 [2022-11-18 20:51:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:15,832 INFO L495 AbstractCegarLoop]: Abstraction has 1223 states and 3807 transitions. [2022-11-18 20:51:15,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2022-11-18 20:51:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1223 states and 3807 transitions. [2022-11-18 20:51:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:51:15,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:15,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:15,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:16,048 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash -295438054, now seen corresponding path program 1 times [2022-11-18 20:51:16,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:16,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888816121] [2022-11-18 20:51:16,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:16,049 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 [2022-11-18 20:51:16,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:16,051 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:16,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:16,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:51:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:16,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:16,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:16,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888816121] [2022-11-18 20:51:16,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888816121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:16,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:16,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:51:16,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324670494] [2022-11-18 20:51:16,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:16,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:51:16,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:16,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:51:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:51:16,617 INFO L87 Difference]: Start difference. First operand 1223 states and 3807 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) [2022-11-18 20:51:20,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:20,435 INFO L93 Difference]: Finished difference Result 2127 states and 6551 transitions. [2022-11-18 20:51:20,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:51:20,437 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 [2022-11-18 20:51:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:20,442 INFO L225 Difference]: With dead ends: 2127 [2022-11-18 20:51:20,442 INFO L226 Difference]: Without dead ends: 2127 [2022-11-18 20:51:20,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:51:20,443 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 325 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:20,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 71 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-18 20:51:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2127 states. [2022-11-18 20:51:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2127 to 1719. [2022-11-18 20:51:20,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1656 states have (on average 3.373792270531401) internal successors, (5587), 1718 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5587 transitions. [2022-11-18 20:51:20,502 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5587 transitions. Word has length 11 [2022-11-18 20:51:20,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:20,503 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 5587 transitions. [2022-11-18 20:51:20,503 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) [2022-11-18 20:51:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5587 transitions. [2022-11-18 20:51:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:51:20,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:20,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:20,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:20,720 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:20,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash -295441371, now seen corresponding path program 1 times [2022-11-18 20:51:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:20,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006601718] [2022-11-18 20:51:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:20,721 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 [2022-11-18 20:51:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:20,722 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:20,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:21,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:51:21,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:21,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:51:21,238 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:51:21,425 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:51:21,426 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:51:21,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:21,617 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 [2022-11-18 20:51:21,638 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:51:21,638 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 [2022-11-18 20:51:21,718 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:51:21,719 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 16 treesize of output 18 [2022-11-18 20:51:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:21,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:24,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:24,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006601718] [2022-11-18 20:51:24,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006601718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:24,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:24,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:51:24,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827954546] [2022-11-18 20:51:24,963 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:24,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:51:24,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:51:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:51:24,964 INFO L87 Difference]: Start difference. First operand 1719 states and 5587 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) [2022-11-18 20:51:26,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:26,711 INFO L93 Difference]: Finished difference Result 3191 states and 10226 transitions. [2022-11-18 20:51:26,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:51:26,713 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 [2022-11-18 20:51:26,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:26,722 INFO L225 Difference]: With dead ends: 3191 [2022-11-18 20:51:26,722 INFO L226 Difference]: Without dead ends: 3191 [2022-11-18 20:51:26,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:51:26,723 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 97 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 365 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:26,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 44 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 365 Unchecked, 1.5s Time] [2022-11-18 20:51:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2022-11-18 20:51:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 1719. [2022-11-18 20:51:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1656 states have (on average 3.373792270531401) internal successors, (5587), 1718 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5587 transitions. [2022-11-18 20:51:26,784 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5587 transitions. Word has length 11 [2022-11-18 20:51:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:26,785 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 5587 transitions. [2022-11-18 20:51:26,785 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) [2022-11-18 20:51:26,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5587 transitions. [2022-11-18 20:51:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:51:26,786 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:26,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:26,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:26,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:26,991 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:26,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash -294953489, now seen corresponding path program 1 times [2022-11-18 20:51:26,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:26,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818927056] [2022-11-18 20:51:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:26,992 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 [2022-11-18 20:51:26,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:26,993 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:26,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:51:27,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:27,366 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:51:27,367 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:51:27,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:27,447 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 20 [2022-11-18 20:51:27,524 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:51:27,524 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 [2022-11-18 20:51:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:51:27,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:27,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:27,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818927056] [2022-11-18 20:51:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818927056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:27,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:27,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:51:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513816091] [2022-11-18 20:51:27,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:51:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:51:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:51:27,606 INFO L87 Difference]: Start difference. First operand 1719 states and 5587 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-18 20:51:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:27,887 INFO L93 Difference]: Finished difference Result 1719 states and 5626 transitions. [2022-11-18 20:51:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:27,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 [2022-11-18 20:51:27,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:27,893 INFO L225 Difference]: With dead ends: 1719 [2022-11-18 20:51:27,894 INFO L226 Difference]: Without dead ends: 1719 [2022-11-18 20:51:27,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:27,894 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:27,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-11-18 20:51:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2022-11-18 20:51:27,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2022-11-18 20:51:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1656 states have (on average 3.3973429951690823) internal successors, (5626), 1718 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:27,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 5626 transitions. [2022-11-18 20:51:27,928 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 5626 transitions. Word has length 11 [2022-11-18 20:51:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:27,928 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 5626 transitions. [2022-11-18 20:51:27,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2022-11-18 20:51:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 5626 transitions. [2022-11-18 20:51:27,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:51:27,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:27,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:27,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:28,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:28,129 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:28,130 INFO L85 PathProgramCache]: Analyzing trace with hash -294953488, now seen corresponding path program 1 times [2022-11-18 20:51:28,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:28,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [890022466] [2022-11-18 20:51:28,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:28,130 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 [2022-11-18 20:51:28,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:28,131 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:28,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:28,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:51:28,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:28,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:28,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:28,525 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-18 20:51:28,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-18 20:51:28,549 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 18 treesize of output 16 [2022-11-18 20:51:28,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:51:28,803 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:51:28,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2022-11-18 20:51:29,051 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:51:29,052 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 16 [2022-11-18 20:51:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:29,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:51:37,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:37,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [890022466] [2022-11-18 20:51:37,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [890022466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:37,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:37,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-18 20:51:37,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927123376] [2022-11-18 20:51:37,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:37,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:51:37,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:37,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:51:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:51:37,142 INFO L87 Difference]: Start difference. First operand 1719 states and 5626 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) [2022-11-18 20:51:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:37,415 INFO L93 Difference]: Finished difference Result 1741 states and 5694 transitions. [2022-11-18 20:51:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:51:37,417 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 [2022-11-18 20:51:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:37,421 INFO L225 Difference]: With dead ends: 1741 [2022-11-18 20:51:37,421 INFO L226 Difference]: Without dead ends: 1741 [2022-11-18 20:51:37,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:51:37,422 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:37,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-11-18 20:51:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-11-18 20:51:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1728. [2022-11-18 20:51:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1665 states have (on average 3.3957957957957956) internal successors, (5654), 1727 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 5654 transitions. [2022-11-18 20:51:37,455 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 5654 transitions. Word has length 11 [2022-11-18 20:51:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:37,455 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 5654 transitions. [2022-11-18 20:51:37,455 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) [2022-11-18 20:51:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 5654 transitions. [2022-11-18 20:51:37,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:51:37,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:37,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:37,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:37,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:37,665 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:37,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 101446031, now seen corresponding path program 1 times [2022-11-18 20:51:37,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:37,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1508546285] [2022-11-18 20:51:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:37,667 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 [2022-11-18 20:51:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:37,668 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:37,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:37,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:51:37,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:37,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:37,977 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:37,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1508546285] [2022-11-18 20:51:37,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1508546285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:37,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:37,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:51:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247542148] [2022-11-18 20:51:37,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:37,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:51:37,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:51:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:51:37,979 INFO L87 Difference]: Start difference. First operand 1728 states and 5654 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) [2022-11-18 20:51:38,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:38,797 INFO L93 Difference]: Finished difference Result 1553 states and 5045 transitions. [2022-11-18 20:51:38,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:38,799 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 [2022-11-18 20:51:38,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:38,803 INFO L225 Difference]: With dead ends: 1553 [2022-11-18 20:51:38,803 INFO L226 Difference]: Without dead ends: 1553 [2022-11-18 20:51:38,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:51:38,803 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 52 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:38,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 13 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:51:38,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2022-11-18 20:51:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1537. [2022-11-18 20:51:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1474 states have (on average 3.4131614654002713) internal successors, (5031), 1536 states have internal predecessors, (5031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5031 transitions. [2022-11-18 20:51:38,832 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5031 transitions. Word has length 11 [2022-11-18 20:51:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:38,832 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 5031 transitions. [2022-11-18 20:51:38,832 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) [2022-11-18 20:51:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5031 transitions. [2022-11-18 20:51:38,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:51:38,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:38,833 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-18 20:51:38,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:39,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:39,035 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:51:39,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:39,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2094627305, now seen corresponding path program 3 times [2022-11-18 20:51:39,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:39,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1809331779] [2022-11-18 20:51:39,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:51:39,036 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 [2022-11-18 20:51:39,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:39,039 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:51:39,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:51:39,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:51:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:39,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:51:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:39,467 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:51:39,467 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:51:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:40,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:43,748 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:43,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1809331779] [2022-11-18 20:51:43,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1809331779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:43,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:43,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2022-11-18 20:51:43,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437243762] [2022-11-18 20:51:43,749 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:51:43,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:51:43,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:51:43,751 INFO L87 Difference]: Start difference. First operand 1537 states and 5031 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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) [2022-11-18 20:52:03,054 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 [] [2022-11-18 20:52:05,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:07,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:09,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:11,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:13,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:15,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:17,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:19,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:21,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:28,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:30,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:32,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:34,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:36,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:38,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:40,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:42,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:44,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:46,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:52:54,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:54,937 INFO L93 Difference]: Finished difference Result 9228 states and 31039 transitions. [2022-11-18 20:52:54,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:52:54,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 12 [2022-11-18 20:52:54,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:54,965 INFO L225 Difference]: With dead ends: 9228 [2022-11-18 20:52:54,965 INFO L226 Difference]: Without dead ends: 9228 [2022-11-18 20:52:54,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:52:54,966 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3717 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 4628 mSolverCounterSat, 320 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3717 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 4968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4628 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:54,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3717 Valid, 393 Invalid, 4968 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [320 Valid, 4628 Invalid, 20 Unknown, 0 Unchecked, 54.6s Time] [2022-11-18 20:52:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9228 states. [2022-11-18 20:52:55,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9228 to 1568. [2022-11-18 20:52:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1505 states have (on average 3.3840531561461793) internal successors, (5093), 1567 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:55,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 5093 transitions. [2022-11-18 20:52:55,091 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 5093 transitions. Word has length 12 [2022-11-18 20:52:55,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:55,092 INFO L495 AbstractCegarLoop]: Abstraction has 1568 states and 5093 transitions. [2022-11-18 20:52:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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) [2022-11-18 20:52:55,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 5093 transitions. [2022-11-18 20:52:55,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:52:55,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:55,093 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:55,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Ended with exit code 0 [2022-11-18 20:52:55,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:55,307 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:52:55,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash 228353138, now seen corresponding path program 1 times [2022-11-18 20:52:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:55,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1644717602] [2022-11-18 20:52:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:55,308 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 [2022-11-18 20:52:55,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:55,309 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:52:55,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:52:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:55,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:52:55,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:55,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:52:55,670 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:52:55,914 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 13 treesize of output 9 [2022-11-18 20:52:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:56,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:56,585 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:56,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1644717602] [2022-11-18 20:52:56,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1644717602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:56,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:56,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 20:52:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564082643] [2022-11-18 20:52:56,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:52:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:52:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:52:56,588 INFO L87 Difference]: Start difference. First operand 1568 states and 5093 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:00,783 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 [] [2022-11-18 20:53:02,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:04,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:06,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:07,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:10,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:12,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:53:14,208 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 [] [2022-11-18 20:53:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:17,449 INFO L93 Difference]: Finished difference Result 4839 states and 15958 transitions. [2022-11-18 20:53:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:53:17,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:53:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:17,462 INFO L225 Difference]: With dead ends: 4839 [2022-11-18 20:53:17,462 INFO L226 Difference]: Without dead ends: 4839 [2022-11-18 20:53:17,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:53:17,463 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 852 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 162 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:17,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 105 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1239 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2022-11-18 20:53:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4839 states. [2022-11-18 20:53:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4839 to 1574. [2022-11-18 20:53:17,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1511 states have (on average 3.374586366644606) internal successors, (5099), 1573 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5099 transitions. [2022-11-18 20:53:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5099 transitions. Word has length 12 [2022-11-18 20:53:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:17,532 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 5099 transitions. [2022-11-18 20:53:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5099 transitions. [2022-11-18 20:53:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:53:17,534 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:17,534 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:17,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:17,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:17,747 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:17,747 INFO L85 PathProgramCache]: Analyzing trace with hash -822107536, now seen corresponding path program 2 times [2022-11-18 20:53:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186400173] [2022-11-18 20:53:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:17,748 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 [2022-11-18 20:53:17,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:17,749 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:17,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:17,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:53:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:17,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:53:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:18,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:53:18,091 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:53:18,281 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:53:18,281 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:53:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:18,411 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 [2022-11-18 20:53:18,424 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:18,424 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 [2022-11-18 20:53:18,489 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:53:18,489 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 16 treesize of output 18 [2022-11-18 20:53:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:53:18,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:18,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186400173] [2022-11-18 20:53:18,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186400173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:18,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:18,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:53:18,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886362563] [2022-11-18 20:53:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:18,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:53:18,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:53:18,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:18,587 INFO L87 Difference]: Start difference. First operand 1574 states and 5099 transitions. Second operand has 5 states, 4 states have (on average 2.5) 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) [2022-11-18 20:53:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:19,280 INFO L93 Difference]: Finished difference Result 1892 states and 5973 transitions. [2022-11-18 20:53:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:53:19,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) 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 12 [2022-11-18 20:53:19,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:19,286 INFO L225 Difference]: With dead ends: 1892 [2022-11-18 20:53:19,286 INFO L226 Difference]: Without dead ends: 1892 [2022-11-18 20:53:19,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:53:19,287 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 122 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:19,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 7 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:53:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-11-18 20:53:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1280. [2022-11-18 20:53:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1217 states have (on average 3.269515201314708) internal successors, (3979), 1279 states have internal predecessors, (3979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:19,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 3979 transitions. [2022-11-18 20:53:19,315 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 3979 transitions. Word has length 12 [2022-11-18 20:53:19,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:19,316 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 3979 transitions. [2022-11-18 20:53:19,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) 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) [2022-11-18 20:53:19,316 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 3979 transitions. [2022-11-18 20:53:19,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:53:19,317 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:19,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:19,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-18 20:53:19,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:19,527 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:19,527 INFO L85 PathProgramCache]: Analyzing trace with hash -553637026, now seen corresponding path program 1 times [2022-11-18 20:53:19,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:19,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595583528] [2022-11-18 20:53:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:19,528 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 [2022-11-18 20:53:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:19,529 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:19,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:19,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:53:19,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:19,803 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 [2022-11-18 20:53:19,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:53:19,842 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 [2022-11-18 20:53:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:19,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:19,867 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595583528] [2022-11-18 20:53:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595583528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:19,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:19,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:53:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007775766] [2022-11-18 20:53:19,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:53:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:19,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:53:19,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:53:19,881 INFO L87 Difference]: Start difference. First operand 1280 states and 3979 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:20,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:20,247 INFO L93 Difference]: Finished difference Result 1028 states and 3095 transitions. [2022-11-18 20:53:20,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:53:20,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:53:20,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:20,250 INFO L225 Difference]: With dead ends: 1028 [2022-11-18 20:53:20,251 INFO L226 Difference]: Without dead ends: 1028 [2022-11-18 20:53:20,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:20,252 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:20,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:53:20,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-11-18 20:53:20,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1028. [2022-11-18 20:53:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 987 states have (on average 3.1357649442755826) internal successors, (3095), 1027 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:20,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3095 transitions. [2022-11-18 20:53:20,269 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3095 transitions. Word has length 12 [2022-11-18 20:53:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:20,269 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 3095 transitions. [2022-11-18 20:53:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3095 transitions. [2022-11-18 20:53:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:53:20,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:20,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:20,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:20,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:20,472 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash -553637025, now seen corresponding path program 1 times [2022-11-18 20:53:20,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:20,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126911470] [2022-11-18 20:53:20,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:20,473 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:20,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:20,474 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:20,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:20,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:53:20,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:20,853 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 [2022-11-18 20:53:20,863 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 [2022-11-18 20:53:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:20,954 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 [2022-11-18 20:53:20,965 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:20,965 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 [2022-11-18 20:53:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:21,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:23,428 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_179| (_ BitVec 32))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_179|) (_ bv0 1)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse0)) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_179| (_ BitVec 32))) (or (forall ((v_ArrVal_1226 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_179| v_ArrVal_1226) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_179|) (_ bv0 1))))))) is different from false [2022-11-18 20:53:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:53:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:23,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:23,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126911470] [2022-11-18 20:53:23,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126911470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:23,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:23,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:53:23,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498420872] [2022-11-18 20:53:23,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:53:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:23,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:53:23,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=85, Unknown=1, NotChecked=18, Total=132 [2022-11-18 20:53:23,619 INFO L87 Difference]: Start difference. First operand 1028 states and 3095 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-18 20:53:28,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:28,074 INFO L93 Difference]: Finished difference Result 1232 states and 3553 transitions. [2022-11-18 20:53:28,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:53:28,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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 12 [2022-11-18 20:53:28,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:28,079 INFO L225 Difference]: With dead ends: 1232 [2022-11-18 20:53:28,079 INFO L226 Difference]: Without dead ends: 1232 [2022-11-18 20:53:28,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=56, Invalid=187, Unknown=1, NotChecked=28, Total=272 [2022-11-18 20:53:28,080 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:28,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 35 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 220 Invalid, 0 Unknown, 112 Unchecked, 1.1s Time] [2022-11-18 20:53:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-11-18 20:53:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1093. [2022-11-18 20:53:28,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1052 states have (on average 3.085551330798479) internal successors, (3246), 1092 states have internal predecessors, (3246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 3246 transitions. [2022-11-18 20:53:28,100 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 3246 transitions. Word has length 12 [2022-11-18 20:53:28,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:28,100 INFO L495 AbstractCegarLoop]: Abstraction has 1093 states and 3246 transitions. [2022-11-18 20:53:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 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) [2022-11-18 20:53:28,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 3246 transitions. [2022-11-18 20:53:28,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:53:28,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:28,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:28,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:28,302 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:28,302 INFO L85 PathProgramCache]: Analyzing trace with hash -510649814, now seen corresponding path program 1 times [2022-11-18 20:53:28,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:28,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561662196] [2022-11-18 20:53:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:28,303 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 [2022-11-18 20:53:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:28,304 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:28,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:28,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:53:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:28,628 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:53:28,629 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:53:28,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:28,686 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 20 [2022-11-18 20:53:28,739 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-18 20:53:28,739 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 [2022-11-18 20:53:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:28,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:28,852 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:28,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561662196] [2022-11-18 20:53:28,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561662196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:28,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:28,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:53:28,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032721653] [2022-11-18 20:53:28,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:28,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:53:28,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:28,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:53:28,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:53:28,854 INFO L87 Difference]: Start difference. First operand 1093 states and 3246 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-18 20:53:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:29,239 INFO L93 Difference]: Finished difference Result 1094 states and 3247 transitions. [2022-11-18 20:53:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:53:29,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-18 20:53:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:29,244 INFO L225 Difference]: With dead ends: 1094 [2022-11-18 20:53:29,244 INFO L226 Difference]: Without dead ends: 1094 [2022-11-18 20:53:29,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:29,244 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:29,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-11-18 20:53:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-11-18 20:53:29,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2022-11-18 20:53:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1053 states have (on average 3.083570750237417) internal successors, (3247), 1093 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3247 transitions. [2022-11-18 20:53:29,264 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3247 transitions. Word has length 12 [2022-11-18 20:53:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:29,265 INFO L495 AbstractCegarLoop]: Abstraction has 1094 states and 3247 transitions. [2022-11-18 20:53:29,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-18 20:53:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3247 transitions. [2022-11-18 20:53:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:29,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:29,267 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:29,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:29,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:29,483 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:29,483 INFO L85 PathProgramCache]: Analyzing trace with hash 284969104, now seen corresponding path program 2 times [2022-11-18 20:53:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991557440] [2022-11-18 20:53:29,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:29,485 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:29,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:29,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:53:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:29,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:53:29,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:29,860 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-18 20:53:29,860 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 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-18 20:53:29,883 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 147 treesize of output 143 [2022-11-18 20:53:29,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:29,999 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 [2022-11-18 20:53:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:30,081 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 [2022-11-18 20:53:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:53:30,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:30,220 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:30,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991557440] [2022-11-18 20:53:30,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991557440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:30,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:30,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:53:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692982598] [2022-11-18 20:53:30,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:53:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:53:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:30,222 INFO L87 Difference]: Start difference. First operand 1094 states and 3247 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) [2022-11-18 20:53:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:30,683 INFO L93 Difference]: Finished difference Result 1036 states and 3061 transitions. [2022-11-18 20:53:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:53:30,685 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 13 [2022-11-18 20:53:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:30,687 INFO L225 Difference]: With dead ends: 1036 [2022-11-18 20:53:30,687 INFO L226 Difference]: Without dead ends: 1036 [2022-11-18 20:53:30,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:30,688 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:30,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 1 Unchecked, 0.5s Time] [2022-11-18 20:53:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-11-18 20:53:30,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 877. [2022-11-18 20:53:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 845 states have (on average 3.1834319526627217) internal successors, (2690), 876 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2690 transitions. [2022-11-18 20:53:30,705 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2690 transitions. Word has length 13 [2022-11-18 20:53:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:30,705 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2690 transitions. [2022-11-18 20:53:30,705 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) [2022-11-18 20:53:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2690 transitions. [2022-11-18 20:53:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:30,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:30,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:30,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:30,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:30,907 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:30,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:30,908 INFO L85 PathProgramCache]: Analyzing trace with hash -447785283, now seen corresponding path program 1 times [2022-11-18 20:53:30,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:30,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098975387] [2022-11-18 20:53:30,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:30,908 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 [2022-11-18 20:53:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:30,909 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:30,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:31,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:53:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:31,386 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 20:53:31,386 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 20:53:31,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:31,454 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 18 treesize of output 24 [2022-11-18 20:53:31,539 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:53:31,539 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 18 treesize of output 28 [2022-11-18 20:53:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:31,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:31,766 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098975387] [2022-11-18 20:53:31,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098975387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:31,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:31,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:53:31,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286450889] [2022-11-18 20:53:31,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:31,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:53:31,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:53:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:31,769 INFO L87 Difference]: Start difference. First operand 877 states and 2690 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:32,031 INFO L93 Difference]: Finished difference Result 883 states and 2716 transitions. [2022-11-18 20:53:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:53:32,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-18 20:53:32,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:32,035 INFO L225 Difference]: With dead ends: 883 [2022-11-18 20:53:32,035 INFO L226 Difference]: Without dead ends: 883 [2022-11-18 20:53:32,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:32,036 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:32,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 41 Unchecked, 0.3s Time] [2022-11-18 20:53:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-18 20:53:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 883. [2022-11-18 20:53:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 851 states have (on average 3.191539365452409) internal successors, (2716), 882 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:32,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2716 transitions. [2022-11-18 20:53:32,070 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2716 transitions. Word has length 13 [2022-11-18 20:53:32,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:32,070 INFO L495 AbstractCegarLoop]: Abstraction has 883 states and 2716 transitions. [2022-11-18 20:53:32,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:32,071 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2716 transitions. [2022-11-18 20:53:32,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:32,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:32,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:32,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:32,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:32,288 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash -450870093, now seen corresponding path program 2 times [2022-11-18 20:53:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481353988] [2022-11-18 20:53:32,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:32,289 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 [2022-11-18 20:53:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:32,290 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:32,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:53:32,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:32,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:53:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:32,645 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 20:53:32,645 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 20:53:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:32,707 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 18 treesize of output 24 [2022-11-18 20:53:32,790 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:53:32,791 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 18 treesize of output 28 [2022-11-18 20:53:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:33,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:33,039 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:33,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481353988] [2022-11-18 20:53:33,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481353988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:33,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:33,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:53:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196629079] [2022-11-18 20:53:33,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:33,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:53:33,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:33,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:53:33,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:33,041 INFO L87 Difference]: Start difference. First operand 883 states and 2716 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:33,300 INFO L93 Difference]: Finished difference Result 890 states and 2752 transitions. [2022-11-18 20:53:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:53:33,302 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-18 20:53:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:33,304 INFO L225 Difference]: With dead ends: 890 [2022-11-18 20:53:33,304 INFO L226 Difference]: Without dead ends: 890 [2022-11-18 20:53:33,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:33,305 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:33,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 15 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-18 20:53:33,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-18 20:53:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 881. [2022-11-18 20:53:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 849 states have (on average 3.191990577149588) internal successors, (2710), 880 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2710 transitions. [2022-11-18 20:53:33,332 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2710 transitions. Word has length 13 [2022-11-18 20:53:33,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:33,332 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2710 transitions. [2022-11-18 20:53:33,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:33,332 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2710 transitions. [2022-11-18 20:53:33,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:33,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:33,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:33,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:33,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:33,534 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:33,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -451305333, now seen corresponding path program 3 times [2022-11-18 20:53:33,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:33,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243309603] [2022-11-18 20:53:33,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:53:33,535 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 [2022-11-18 20:53:33,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:33,536 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:33,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:33,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-18 20:53:33,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:33,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:53:33,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:33,876 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-18 20:53:33,876 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-18 20:53:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:33,939 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 18 treesize of output 24 [2022-11-18 20:53:34,022 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:53:34,022 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 18 treesize of output 28 [2022-11-18 20:53:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:34,241 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:34,241 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243309603] [2022-11-18 20:53:34,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243309603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:34,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:34,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:53:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451790468] [2022-11-18 20:53:34,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:34,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:53:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:53:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:34,243 INFO L87 Difference]: Start difference. First operand 881 states and 2710 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:34,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:34,467 INFO L93 Difference]: Finished difference Result 885 states and 2732 transitions. [2022-11-18 20:53:34,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:53:34,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-18 20:53:34,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:34,470 INFO L225 Difference]: With dead ends: 885 [2022-11-18 20:53:34,470 INFO L226 Difference]: Without dead ends: 885 [2022-11-18 20:53:34,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:34,471 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:34,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 14 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 58 Unchecked, 0.2s Time] [2022-11-18 20:53:34,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-18 20:53:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 877. [2022-11-18 20:53:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 845 states have (on average 3.188165680473373) internal successors, (2694), 876 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 2694 transitions. [2022-11-18 20:53:34,486 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 2694 transitions. Word has length 13 [2022-11-18 20:53:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 877 states and 2694 transitions. [2022-11-18 20:53:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 2694 transitions. [2022-11-18 20:53:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:34,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:34,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:34,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:34,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:34,690 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:34,690 INFO L85 PathProgramCache]: Analyzing trace with hash 17571215, now seen corresponding path program 1 times [2022-11-18 20:53:34,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:34,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832210681] [2022-11-18 20:53:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:34,691 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:34,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:34,692 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:34,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:34,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:53:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:35,055 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 [2022-11-18 20:53:35,062 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 [2022-11-18 20:53:35,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:35,131 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 [2022-11-18 20:53:35,152 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:35,152 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 [2022-11-18 20:53:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:37,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:53:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:38,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:38,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832210681] [2022-11-18 20:53:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832210681] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:38,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:38,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:53:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989728398] [2022-11-18 20:53:38,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:38,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:53:38,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:38,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:53:38,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:53:38,146 INFO L87 Difference]: Start difference. First operand 877 states and 2694 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-18 20:53:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:44,511 INFO L93 Difference]: Finished difference Result 1026 states and 3073 transitions. [2022-11-18 20:53:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:53:44,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-18 20:53:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:44,515 INFO L225 Difference]: With dead ends: 1026 [2022-11-18 20:53:44,516 INFO L226 Difference]: Without dead ends: 1026 [2022-11-18 20:53:44,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:53:44,517 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:44,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 47 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 206 Invalid, 0 Unknown, 99 Unchecked, 1.4s Time] [2022-11-18 20:53:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-11-18 20:53:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 887. [2022-11-18 20:53:44,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 855 states have (on average 3.191812865497076) internal successors, (2729), 886 states have internal predecessors, (2729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:44,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2729 transitions. [2022-11-18 20:53:44,532 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2729 transitions. Word has length 13 [2022-11-18 20:53:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:44,532 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 2729 transitions. [2022-11-18 20:53:44,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-18 20:53:44,533 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2729 transitions. [2022-11-18 20:53:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:44,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:44,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:44,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:44,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:44,734 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:44,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:44,735 INFO L85 PathProgramCache]: Analyzing trace with hash 17130395, now seen corresponding path program 2 times [2022-11-18 20:53:44,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:44,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025581934] [2022-11-18 20:53:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:44,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:44,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:44,738 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:44,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:44,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:53:44,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:44,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:53:44,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:44,965 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 [2022-11-18 20:53:44,979 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 [2022-11-18 20:53:45,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:45,039 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 [2022-11-18 20:53:45,059 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:45,060 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 [2022-11-18 20:53:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:45,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:45,195 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:45,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025581934] [2022-11-18 20:53:45,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025581934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:45,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:45,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:53:45,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794246350] [2022-11-18 20:53:45,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:45,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:53:45,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:45,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:53:45,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:53:45,196 INFO L87 Difference]: Start difference. First operand 887 states and 2729 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:45,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:45,849 INFO L93 Difference]: Finished difference Result 1198 states and 3759 transitions. [2022-11-18 20:53:45,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:53:45,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2022-11-18 20:53:45,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:45,854 INFO L225 Difference]: With dead ends: 1198 [2022-11-18 20:53:45,854 INFO L226 Difference]: Without dead ends: 1198 [2022-11-18 20:53:45,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:53:45,854 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 138 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:45,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 7 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:53:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1198 states. [2022-11-18 20:53:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1198 to 960. [2022-11-18 20:53:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 928 states have (on average 3.4342672413793105) internal successors, (3187), 959 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:45,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 3187 transitions. [2022-11-18 20:53:45,872 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 3187 transitions. Word has length 13 [2022-11-18 20:53:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:45,872 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 3187 transitions. [2022-11-18 20:53:45,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2022-11-18 20:53:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 3187 transitions. [2022-11-18 20:53:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:45,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:45,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:45,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:46,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:46,074 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:46,075 INFO L85 PathProgramCache]: Analyzing trace with hash 17128909, now seen corresponding path program 1 times [2022-11-18 20:53:46,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:46,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [61878226] [2022-11-18 20:53:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:46,075 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 [2022-11-18 20:53:46,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:46,076 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:46,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:53:46,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:46,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:46,599 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [61878226] [2022-11-18 20:53:46,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [61878226] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:46,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:46,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 20:53:46,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34287077] [2022-11-18 20:53:46,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:46,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:53:46,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:46,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:53:46,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:53:46,601 INFO L87 Difference]: Start difference. First operand 960 states and 3187 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:48,110 INFO L93 Difference]: Finished difference Result 1132 states and 3473 transitions. [2022-11-18 20:53:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:53:48,112 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:53:48,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:48,115 INFO L225 Difference]: With dead ends: 1132 [2022-11-18 20:53:48,115 INFO L226 Difference]: Without dead ends: 1132 [2022-11-18 20:53:48,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:53:48,116 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 280 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:48,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 32 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-18 20:53:48,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-11-18 20:53:48,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 939. [2022-11-18 20:53:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 907 states have (on average 3.306504961411246) internal successors, (2999), 938 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2999 transitions. [2022-11-18 20:53:48,132 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2999 transitions. Word has length 13 [2022-11-18 20:53:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:48,133 INFO L495 AbstractCegarLoop]: Abstraction has 939 states and 2999 transitions. [2022-11-18 20:53:48,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2999 transitions. [2022-11-18 20:53:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:48,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:48,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:48,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:48,334 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:48,335 INFO L85 PathProgramCache]: Analyzing trace with hash 17134024, now seen corresponding path program 1 times [2022-11-18 20:53:48,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:48,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417638572] [2022-11-18 20:53:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:48,335 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 [2022-11-18 20:53:48,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:48,336 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:48,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:53:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:48,703 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-18 20:53:48,704 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 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-18 20:53:48,751 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:53:48,755 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 24 [2022-11-18 20:53:48,800 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-18 20:53:48,801 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 18 treesize of output 28 [2022-11-18 20:53:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:53:48,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:53:48,916 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:48,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417638572] [2022-11-18 20:53:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417638572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:53:48,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:53:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:53:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032439748] [2022-11-18 20:53:48,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:53:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:53:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:53:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:48,919 INFO L87 Difference]: Start difference. First operand 939 states and 2999 transitions. Second operand has 5 states, 4 states have (on average 3.25) 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) [2022-11-18 20:53:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:49,193 INFO L93 Difference]: Finished difference Result 902 states and 2898 transitions. [2022-11-18 20:53:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:53:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) 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 [2022-11-18 20:53:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:49,196 INFO L225 Difference]: With dead ends: 902 [2022-11-18 20:53:49,196 INFO L226 Difference]: Without dead ends: 902 [2022-11-18 20:53:49,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:53:49,197 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:49,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-18 20:53:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2022-11-18 20:53:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 902. [2022-11-18 20:53:49,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 879 states have (on average 3.2969283276450514) internal successors, (2898), 901 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2898 transitions. [2022-11-18 20:53:49,220 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2898 transitions. Word has length 13 [2022-11-18 20:53:49,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:49,220 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 2898 transitions. [2022-11-18 20:53:49,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) 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) [2022-11-18 20:53:49,220 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2898 transitions. [2022-11-18 20:53:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:53:49,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:49,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:49,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:49,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:49,437 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:49,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash 17133774, now seen corresponding path program 1 times [2022-11-18 20:53:49,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:49,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314966938] [2022-11-18 20:53:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:49,438 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 [2022-11-18 20:53:49,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:49,439 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:49,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:53:49,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:49,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:53:50,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:53:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314966938] [2022-11-18 20:53:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314966938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:50,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:53:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:53:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824341099] [2022-11-18 20:53:50,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:50,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:53:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:53:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:53:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:53:50,069 INFO L87 Difference]: Start difference. First operand 902 states and 2898 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-18 20:53:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:54,344 INFO L93 Difference]: Finished difference Result 1002 states and 3021 transitions. [2022-11-18 20:53:54,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:53:54,345 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 [2022-11-18 20:53:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:54,347 INFO L225 Difference]: With dead ends: 1002 [2022-11-18 20:53:54,348 INFO L226 Difference]: Without dead ends: 1002 [2022-11-18 20:53:54,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:53:54,348 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 191 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:54,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 79 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-18 20:53:54,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-11-18 20:53:54,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 940. [2022-11-18 20:53:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 917 states have (on average 3.1821155943293347) internal successors, (2918), 939 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:53:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2918 transitions. [2022-11-18 20:53:54,364 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2918 transitions. Word has length 13 [2022-11-18 20:53:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:54,364 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 2918 transitions. [2022-11-18 20:53:54,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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) [2022-11-18 20:53:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2918 transitions. [2022-11-18 20:53:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:53:54,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:54,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:54,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:54,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:54,565 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:53:54,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:54,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1226083620, now seen corresponding path program 2 times [2022-11-18 20:53:54,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:54,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843979703] [2022-11-18 20:53:54,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:54,567 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 [2022-11-18 20:53:54,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:54,568 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:53:54,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:53:54,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:53:54,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:54,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:53:54,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:55,020 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-18 20:53:55,020 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-18 20:53:55,156 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:53:55,157 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:53:55,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:55,258 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 [2022-11-18 20:53:55,294 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:53:55,294 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 [2022-11-18 20:53:55,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:53:55,359 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 [2022-11-18 20:53:55,369 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:53:55,370 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 [2022-11-18 20:53:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:53:55,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:54:01,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:01,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843979703] [2022-11-18 20:54:01,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843979703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:01,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 20:54:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916545124] [2022-11-18 20:54:01,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:54:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:54:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2022-11-18 20:54:01,192 INFO L87 Difference]: Start difference. First operand 940 states and 2918 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-18 20:54:03,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:03,289 INFO L93 Difference]: Finished difference Result 1697 states and 5106 transitions. [2022-11-18 20:54:03,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:54:03,291 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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 14 [2022-11-18 20:54:03,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:03,295 INFO L225 Difference]: With dead ends: 1697 [2022-11-18 20:54:03,295 INFO L226 Difference]: Without dead ends: 1697 [2022-11-18 20:54:03,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2022-11-18 20:54:03,296 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:03,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 62 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 395 Invalid, 0 Unknown, 300 Unchecked, 2.1s Time] [2022-11-18 20:54:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-11-18 20:54:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1022. [2022-11-18 20:54:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 999 states have (on average 3.2822822822822824) internal successors, (3279), 1021 states have internal predecessors, (3279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 3279 transitions. [2022-11-18 20:54:03,318 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 3279 transitions. Word has length 14 [2022-11-18 20:54:03,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:03,319 INFO L495 AbstractCegarLoop]: Abstraction has 1022 states and 3279 transitions. [2022-11-18 20:54:03,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-11-18 20:54:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 3279 transitions. [2022-11-18 20:54:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:54:03,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:03,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:03,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:03,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:03,522 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:03,522 INFO L85 PathProgramCache]: Analyzing trace with hash 544820369, now seen corresponding path program 1 times [2022-11-18 20:54:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:03,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [576616335] [2022-11-18 20:54:03,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:03,523 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 [2022-11-18 20:54:03,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:03,524 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:03,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:03,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:54:03,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:04,031 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:54:04,031 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:54:04,192 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:54:04,192 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:54:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:04,354 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 [2022-11-18 20:54:04,366 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:04,366 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 [2022-11-18 20:54:04,448 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:54:04,448 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 16 treesize of output 18 [2022-11-18 20:54:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:04,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:07,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:07,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [576616335] [2022-11-18 20:54:07,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [576616335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:07,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:07,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:54:07,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431930525] [2022-11-18 20:54:07,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:07,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:07,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:07,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:07,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:54:07,681 INFO L87 Difference]: Start difference. First operand 1022 states and 3279 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-18 20:54:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:08,353 INFO L93 Difference]: Finished difference Result 1341 states and 4462 transitions. [2022-11-18 20:54:08,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:54:08,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-18 20:54:08,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:08,358 INFO L225 Difference]: With dead ends: 1341 [2022-11-18 20:54:08,358 INFO L226 Difference]: Without dead ends: 1341 [2022-11-18 20:54:08,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:54:08,359 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:08,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 64 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 243 Unchecked, 0.6s Time] [2022-11-18 20:54:08,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-11-18 20:54:08,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1217. [2022-11-18 20:54:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1194 states have (on average 3.336683417085427) internal successors, (3984), 1216 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3984 transitions. [2022-11-18 20:54:08,391 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3984 transitions. Word has length 14 [2022-11-18 20:54:08,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:08,391 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 3984 transitions. [2022-11-18 20:54:08,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-18 20:54:08,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3984 transitions. [2022-11-18 20:54:08,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:54:08,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:08,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:08,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:08,606 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash 544820794, now seen corresponding path program 1 times [2022-11-18 20:54:08,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:08,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040717112] [2022-11-18 20:54:08,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:08,607 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 [2022-11-18 20:54:08,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:08,608 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:08,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:08,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:54:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:09,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:09,309 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 [2022-11-18 20:54:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:09,402 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:09,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040717112] [2022-11-18 20:54:09,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040717112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:09,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:09,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-11-18 20:54:09,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821181319] [2022-11-18 20:54:09,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:54:09,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:09,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:54:09,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:54:09,404 INFO L87 Difference]: Start difference. First operand 1217 states and 3984 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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) [2022-11-18 20:54:11,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:11,260 INFO L93 Difference]: Finished difference Result 1853 states and 5975 transitions. [2022-11-18 20:54:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:54:11,262 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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 14 [2022-11-18 20:54:11,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:11,266 INFO L225 Difference]: With dead ends: 1853 [2022-11-18 20:54:11,266 INFO L226 Difference]: Without dead ends: 1853 [2022-11-18 20:54:11,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:54:11,267 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 329 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:11,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 32 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 20:54:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2022-11-18 20:54:11,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1325. [2022-11-18 20:54:11,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1302 states have (on average 3.644393241167435) internal successors, (4745), 1324 states have internal predecessors, (4745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 4745 transitions. [2022-11-18 20:54:11,315 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 4745 transitions. Word has length 14 [2022-11-18 20:54:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:11,315 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 4745 transitions. [2022-11-18 20:54:11,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 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) [2022-11-18 20:54:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 4745 transitions. [2022-11-18 20:54:11,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:54:11,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:11,316 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:11,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:11,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:11,531 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash 544820619, now seen corresponding path program 1 times [2022-11-18 20:54:11,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:11,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5169331] [2022-11-18 20:54:11,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:11,532 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 [2022-11-18 20:54:11,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:11,533 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:11,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:54:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:12,065 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 [2022-11-18 20:54:12,076 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 [2022-11-18 20:54:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:12,155 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 [2022-11-18 20:54:12,178 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:12,178 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 [2022-11-18 20:54:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:12,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:14,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:54:15,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:15,032 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:15,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5169331] [2022-11-18 20:54:15,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5169331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:15,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:15,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:54:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869927797] [2022-11-18 20:54:15,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:15,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:54:15,035 INFO L87 Difference]: Start difference. First operand 1325 states and 4745 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-18 20:54:17,530 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32)))) (and (= c_~N~0 |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_201| (_ BitVec 32))) (or (forall ((v_ArrVal_1947 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_201| v_ArrVal_1947) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_201|) (_ bv0 1))))) (or (bvule (_ bv4 32) (bvmul c_~N~0 (_ bv4 32))) (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~3#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (bvule |c_ULTIMATE.start_create_fresh_int_array_~size#1| (_ bv1073741823 32)) (or (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_201| (_ BitVec 32))) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_201|) (_ bv0 1)))) (bvule |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse0)) (= (_ bv0 32) |c_ULTIMATE.start_create_fresh_int_array_~i~3#1|))) is different from false [2022-11-18 20:54:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:18,615 INFO L93 Difference]: Finished difference Result 1538 states and 5302 transitions. [2022-11-18 20:54:18,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:54:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2022-11-18 20:54:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:18,620 INFO L225 Difference]: With dead ends: 1538 [2022-11-18 20:54:18,620 INFO L226 Difference]: Without dead ends: 1538 [2022-11-18 20:54:18,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=53, Invalid=190, Unknown=1, NotChecked=28, Total=272 [2022-11-18 20:54:18,621 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:18,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 56 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 232 Invalid, 0 Unknown, 64 Unchecked, 1.1s Time] [2022-11-18 20:54:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-11-18 20:54:18,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1407. [2022-11-18 20:54:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1384 states have (on average 3.601878612716763) internal successors, (4985), 1406 states have internal predecessors, (4985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 4985 transitions. [2022-11-18 20:54:18,646 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 4985 transitions. Word has length 14 [2022-11-18 20:54:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:18,647 INFO L495 AbstractCegarLoop]: Abstraction has 1407 states and 4985 transitions. [2022-11-18 20:54:18,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-11-18 20:54:18,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 4985 transitions. [2022-11-18 20:54:18,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:54:18,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:18,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:18,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:18,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:18,849 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 544820797, now seen corresponding path program 1 times [2022-11-18 20:54:18,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:18,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585175816] [2022-11-18 20:54:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:18,849 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 [2022-11-18 20:54:18,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:18,851 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:18,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:54:19,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:19,083 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 6 treesize of output 7 [2022-11-18 20:54:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:54:19,110 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:54:19,110 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585175816] [2022-11-18 20:54:19,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585175816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:54:19,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:54:19,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:54:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012776201] [2022-11-18 20:54:19,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:54:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:54:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:54:19,111 INFO L87 Difference]: Start difference. First operand 1407 states and 4985 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-11-18 20:54:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:19,385 INFO L93 Difference]: Finished difference Result 1299 states and 4446 transitions. [2022-11-18 20:54:19,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:54:19,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-18 20:54:19,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:19,389 INFO L225 Difference]: With dead ends: 1299 [2022-11-18 20:54:19,390 INFO L226 Difference]: Without dead ends: 1299 [2022-11-18 20:54:19,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:54:19,390 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:19,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:54:19,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299 states. [2022-11-18 20:54:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1299 to 1299. [2022-11-18 20:54:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1280 states have (on average 3.4734375) internal successors, (4446), 1298 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 4446 transitions. [2022-11-18 20:54:19,431 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 4446 transitions. Word has length 14 [2022-11-18 20:54:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:19,431 INFO L495 AbstractCegarLoop]: Abstraction has 1299 states and 4446 transitions. [2022-11-18 20:54:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 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) [2022-11-18 20:54:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 4446 transitions. [2022-11-18 20:54:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:54:19,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:19,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:19,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:19,633 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:19,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:19,633 INFO L85 PathProgramCache]: Analyzing trace with hash 646127822, now seen corresponding path program 3 times [2022-11-18 20:54:19,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:19,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [631845555] [2022-11-18 20:54:19,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:54:19,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:19,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:19,635 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:19,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:19,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:54:19,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:19,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:54:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:20,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:54:20,132 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:54:20,294 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:54:20,294 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:54:20,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:20,464 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 [2022-11-18 20:54:20,497 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:54:20,497 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 [2022-11-18 20:54:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:20,589 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 [2022-11-18 20:54:20,602 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:20,603 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 [2022-11-18 20:54:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:54:20,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:54:24,447 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [631845555] [2022-11-18 20:54:24,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [631845555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:24,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:24,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 20:54:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436200549] [2022-11-18 20:54:24,448 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:24,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:54:24,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:54:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:54:24,448 INFO L87 Difference]: Start difference. First operand 1299 states and 4446 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-18 20:54:36,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:36,644 INFO L93 Difference]: Finished difference Result 2035 states and 7002 transitions. [2022-11-18 20:54:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:54:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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 [2022-11-18 20:54:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:36,657 INFO L225 Difference]: With dead ends: 2035 [2022-11-18 20:54:36,657 INFO L226 Difference]: Without dead ends: 1995 [2022-11-18 20:54:36,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:54:36,658 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 370 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:36,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 127 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 696 Invalid, 0 Unknown, 191 Unchecked, 6.5s Time] [2022-11-18 20:54:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-18 20:54:36,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1717. [2022-11-18 20:54:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1695 states have (on average 3.6088495575221238) internal successors, (6117), 1716 states have internal predecessors, (6117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:36,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6117 transitions. [2022-11-18 20:54:36,703 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6117 transitions. Word has length 15 [2022-11-18 20:54:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:36,703 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 6117 transitions. [2022-11-18 20:54:36,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-11-18 20:54:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6117 transitions. [2022-11-18 20:54:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:54:36,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:36,705 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:36,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:36,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:36,911 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:36,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:36,911 INFO L85 PathProgramCache]: Analyzing trace with hash -290430689, now seen corresponding path program 1 times [2022-11-18 20:54:36,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:36,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142681164] [2022-11-18 20:54:36,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:36,912 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 [2022-11-18 20:54:36,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:36,913 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:36,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:54:37,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:37,456 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:54:37,456 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:54:37,659 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:54:37,659 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:54:37,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:37,826 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 14 treesize of output 16 [2022-11-18 20:54:37,846 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:37,847 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 [2022-11-18 20:54:37,929 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:54:37,930 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 16 treesize of output 18 [2022-11-18 20:54:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:38,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:45,280 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:45,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142681164] [2022-11-18 20:54:45,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142681164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:45,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:45,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:54:45,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018497160] [2022-11-18 20:54:45,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:45,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:54:45,282 INFO L87 Difference]: Start difference. First operand 1717 states and 6117 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:46,092 INFO L93 Difference]: Finished difference Result 1898 states and 6586 transitions. [2022-11-18 20:54:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:54:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-18 20:54:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:46,099 INFO L225 Difference]: With dead ends: 1898 [2022-11-18 20:54:46,100 INFO L226 Difference]: Without dead ends: 1898 [2022-11-18 20:54:46,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:54:46,100 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:46,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 45 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-11-18 20:54:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2022-11-18 20:54:46,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1729. [2022-11-18 20:54:46,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1729 states, 1707 states have (on average 3.6045694200351495) internal successors, (6153), 1728 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1729 states to 1729 states and 6153 transitions. [2022-11-18 20:54:46,132 INFO L78 Accepts]: Start accepts. Automaton has 1729 states and 6153 transitions. Word has length 15 [2022-11-18 20:54:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:46,132 INFO L495 AbstractCegarLoop]: Abstraction has 1729 states and 6153 transitions. [2022-11-18 20:54:46,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:46,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1729 states and 6153 transitions. [2022-11-18 20:54:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:54:46,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:46,133 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:46,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:46,335 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -290430439, now seen corresponding path program 1 times [2022-11-18 20:54:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141886358] [2022-11-18 20:54:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:46,336 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 [2022-11-18 20:54:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:46,337 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:46,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:46,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:54:46,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:46,785 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 [2022-11-18 20:54:46,793 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 [2022-11-18 20:54:46,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:46,879 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 [2022-11-18 20:54:46,902 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:46,902 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 [2022-11-18 20:54:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:47,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:54:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:47,827 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:47,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141886358] [2022-11-18 20:54:47,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141886358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:47,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:47,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:54:47,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408789553] [2022-11-18 20:54:47,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:47,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:47,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:47,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:54:47,829 INFO L87 Difference]: Start difference. First operand 1729 states and 6153 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:54,585 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 34 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:54:54,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:54,980 INFO L93 Difference]: Finished difference Result 1765 states and 6255 transitions. [2022-11-18 20:54:54,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:54:54,982 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-18 20:54:54,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:54,987 INFO L225 Difference]: With dead ends: 1765 [2022-11-18 20:54:54,987 INFO L226 Difference]: Without dead ends: 1765 [2022-11-18 20:54:54,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:54:54,987 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:54,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 93 Invalid, 0 Unknown, 80 Unchecked, 0.5s Time] [2022-11-18 20:54:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-11-18 20:54:55,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1749. [2022-11-18 20:54:55,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1727 states have (on average 3.609148812970469) internal successors, (6233), 1748 states have internal predecessors, (6233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6233 transitions. [2022-11-18 20:54:55,020 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6233 transitions. Word has length 15 [2022-11-18 20:54:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:55,020 INFO L495 AbstractCegarLoop]: Abstraction has 1749 states and 6233 transitions. [2022-11-18 20:54:55,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:55,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6233 transitions. [2022-11-18 20:54:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:54:55,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:55,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:55,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:55,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:55,231 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:55,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:55,231 INFO L85 PathProgramCache]: Analyzing trace with hash -290423125, now seen corresponding path program 1 times [2022-11-18 20:54:55,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:55,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824416948] [2022-11-18 20:54:55,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:55,232 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:55,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:55,233 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:55,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:54:55,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:55,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:55,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:54:55,951 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:55,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824416948] [2022-11-18 20:54:55,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824416948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:55,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:55,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:54:55,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778145811] [2022-11-18 20:54:55,952 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:55,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:55,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:55,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:54:55,953 INFO L87 Difference]: Start difference. First operand 1749 states and 6233 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:58,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:58,505 INFO L93 Difference]: Finished difference Result 1725 states and 5839 transitions. [2022-11-18 20:54:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:54:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-11-18 20:54:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:58,513 INFO L225 Difference]: With dead ends: 1725 [2022-11-18 20:54:58,513 INFO L226 Difference]: Without dead ends: 1701 [2022-11-18 20:54:58,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:54:58,514 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:58,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 73 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-18 20:54:58,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2022-11-18 20:54:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1651. [2022-11-18 20:54:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1630 states have (on average 3.482208588957055) internal successors, (5676), 1650 states have internal predecessors, (5676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5676 transitions. [2022-11-18 20:54:58,552 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5676 transitions. Word has length 15 [2022-11-18 20:54:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:58,553 INFO L495 AbstractCegarLoop]: Abstraction has 1651 states and 5676 transitions. [2022-11-18 20:54:58,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5676 transitions. [2022-11-18 20:54:58,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:54:58,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:58,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:58,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:58,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:54:58,765 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:54:58,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:58,766 INFO L85 PathProgramCache]: Analyzing trace with hash -290147719, now seen corresponding path program 2 times [2022-11-18 20:54:58,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:54:58,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725525698] [2022-11-18 20:54:58,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:54:58,766 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 [2022-11-18 20:54:58,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:54:58,767 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:54:58,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:54:59,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:54:59,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:59,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:54:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:59,091 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 [2022-11-18 20:54:59,100 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 [2022-11-18 20:54:59,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:54:59,162 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 [2022-11-18 20:54:59,183 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:54:59,183 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 [2022-11-18 20:54:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-18 20:54:59,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:54:59,355 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:54:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725525698] [2022-11-18 20:54:59,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725525698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:54:59,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:54:59,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:54:59,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851442387] [2022-11-18 20:54:59,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:54:59,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:54:59,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:54:59,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:54:59,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:54:59,357 INFO L87 Difference]: Start difference. First operand 1651 states and 5676 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-18 20:54:59,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:59,957 INFO L93 Difference]: Finished difference Result 1843 states and 6026 transitions. [2022-11-18 20:54:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:54:59,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2022-11-18 20:54:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:59,964 INFO L225 Difference]: With dead ends: 1843 [2022-11-18 20:54:59,964 INFO L226 Difference]: Without dead ends: 1843 [2022-11-18 20:54:59,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:54:59,965 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 111 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:59,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 7 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:54:59,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2022-11-18 20:54:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1503. [2022-11-18 20:54:59,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1483 states have (on average 3.4315576534052594) internal successors, (5089), 1502 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:54:59,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5089 transitions. [2022-11-18 20:54:59,997 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5089 transitions. Word has length 15 [2022-11-18 20:54:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:59,997 INFO L495 AbstractCegarLoop]: Abstraction has 1503 states and 5089 transitions. [2022-11-18 20:54:59,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-18 20:54:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5089 transitions. [2022-11-18 20:54:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:54:59,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:59,999 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:00,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:00,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:00,208 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:55:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1634673167, now seen corresponding path program 2 times [2022-11-18 20:55:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:00,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345860862] [2022-11-18 20:55:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:55:00,210 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 [2022-11-18 20:55:00,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:00,211 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:55:00,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:00,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:55:00,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:55:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:00,673 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:55:00,673 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:55:00,849 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:55:00,849 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:55:00,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:00,984 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 [2022-11-18 20:55:01,002 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:55:01,003 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 [2022-11-18 20:55:01,053 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:55:01,053 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 16 treesize of output 18 [2022-11-18 20:55:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:55:01,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:55:01,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:55:01,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345860862] [2022-11-18 20:55:01,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [345860862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:55:01,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:55:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:55:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858605921] [2022-11-18 20:55:01,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:55:01,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:55:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:55:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:55:01,191 INFO L87 Difference]: Start difference. First operand 1503 states and 5089 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-18 20:55:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:01,825 INFO L93 Difference]: Finished difference Result 1587 states and 5181 transitions. [2022-11-18 20:55:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:55:01,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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 16 [2022-11-18 20:55:01,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:01,831 INFO L225 Difference]: With dead ends: 1587 [2022-11-18 20:55:01,831 INFO L226 Difference]: Without dead ends: 1475 [2022-11-18 20:55:01,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:55:01,832 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 76 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:01,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 7 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:55:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-11-18 20:55:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1244. [2022-11-18 20:55:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1225 states have (on average 3.507755102040816) internal successors, (4297), 1243 states have internal predecessors, (4297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 4297 transitions. [2022-11-18 20:55:01,857 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 4297 transitions. Word has length 16 [2022-11-18 20:55:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:01,858 INFO L495 AbstractCegarLoop]: Abstraction has 1244 states and 4297 transitions. [2022-11-18 20:55:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2022-11-18 20:55:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 4297 transitions. [2022-11-18 20:55:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:55:01,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:01,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:01,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:02,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:02,075 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:55:02,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:02,076 INFO L85 PathProgramCache]: Analyzing trace with hash -980057584, now seen corresponding path program 2 times [2022-11-18 20:55:02,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:02,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701681632] [2022-11-18 20:55:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:55:02,076 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 [2022-11-18 20:55:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:02,078 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:55:02,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:02,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:55:02,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:02,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:55:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:02,473 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-18 20:55:02,480 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 5 [2022-11-18 20:55:02,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:02,564 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 [2022-11-18 20:55:02,575 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:55:02,576 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 [2022-11-18 20:55:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:55:02,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:55:04,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:55:04,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701681632] [2022-11-18 20:55:04,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701681632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:04,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:04,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 20:55:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159950842] [2022-11-18 20:55:04,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:04,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:55:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:55:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:55:04,025 INFO L87 Difference]: Start difference. First operand 1244 states and 4297 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2022-11-18 20:55:05,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:05,978 INFO L93 Difference]: Finished difference Result 1616 states and 5692 transitions. [2022-11-18 20:55:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:55:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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 16 [2022-11-18 20:55:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:05,986 INFO L225 Difference]: With dead ends: 1616 [2022-11-18 20:55:05,986 INFO L226 Difference]: Without dead ends: 1616 [2022-11-18 20:55:05,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:55:05,987 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:05,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 51 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 107 Unchecked, 1.9s Time] [2022-11-18 20:55:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1616 states. [2022-11-18 20:55:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1616 to 1418. [2022-11-18 20:55:06,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1399 states have (on average 3.68048606147248) internal successors, (5149), 1417 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:06,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 5149 transitions. [2022-11-18 20:55:06,052 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 5149 transitions. Word has length 16 [2022-11-18 20:55:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:06,052 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 5149 transitions. [2022-11-18 20:55:06,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 14 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) [2022-11-18 20:55:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 5149 transitions. [2022-11-18 20:55:06,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:55:06,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:06,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:06,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:06,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:06,269 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:55:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:06,270 INFO L85 PathProgramCache]: Analyzing trace with hash -317001667, now seen corresponding path program 3 times [2022-11-18 20:55:06,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:06,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [651621508] [2022-11-18 20:55:06,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:55:06,271 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 [2022-11-18 20:55:06,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:06,271 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:55:06,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:06,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:55:06,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:06,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:55:06,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:06,628 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 [2022-11-18 20:55:06,644 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 [2022-11-18 20:55:06,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:55:06,788 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 [2022-11-18 20:55:06,801 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:55:06,801 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 [2022-11-18 20:55:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:55:07,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:08,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:55:08,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:55:08,864 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:55:08,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [651621508] [2022-11-18 20:55:08,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [651621508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:08,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:08,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2022-11-18 20:55:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191083791] [2022-11-18 20:55:08,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:55:08,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:55:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:55:08,866 INFO L87 Difference]: Start difference. First operand 1418 states and 5149 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:17,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:17,111 INFO L93 Difference]: Finished difference Result 2342 states and 8982 transitions. [2022-11-18 20:55:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:55:17,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:55:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:17,124 INFO L225 Difference]: With dead ends: 2342 [2022-11-18 20:55:17,124 INFO L226 Difference]: Without dead ends: 2342 [2022-11-18 20:55:17,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:55:17,125 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 284 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:17,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 146 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 738 Invalid, 0 Unknown, 122 Unchecked, 5.6s Time] [2022-11-18 20:55:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-11-18 20:55:17,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2114. [2022-11-18 20:55:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2095 states have (on average 4.001431980906921) internal successors, (8383), 2113 states have internal predecessors, (8383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:17,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 8383 transitions. [2022-11-18 20:55:17,195 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 8383 transitions. Word has length 17 [2022-11-18 20:55:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:17,195 INFO L495 AbstractCegarLoop]: Abstraction has 2114 states and 8383 transitions. [2022-11-18 20:55:17,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 8383 transitions. [2022-11-18 20:55:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:55:17,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:17,197 INFO L195 NwaCegarLoop]: trace histogram [12, 2, 1, 1, 1] [2022-11-18 20:55:17,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:17,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:55:17,415 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:55:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:17,415 INFO L85 PathProgramCache]: Analyzing trace with hash -750632946, now seen corresponding path program 2 times [2022-11-18 20:55:17,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:55:17,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062050869] [2022-11-18 20:55:17,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:55:17,416 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 [2022-11-18 20:55:17,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:55:17,418 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:55:17,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:55:17,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:55:17,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:55:17,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:17,857 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 [2022-11-18 20:55:18,384 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:55:18,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:55:23,398 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:55:23,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062050869] [2022-11-18 20:55:23,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062050869] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:23,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:23,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 28 [2022-11-18 20:55:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728511477] [2022-11-18 20:55:23,399 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:23,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:55:23,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:55:23,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:55:23,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:55:23,402 INFO L87 Difference]: Start difference. First operand 2114 states and 8383 transitions. Second operand has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:55:52,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:55:53,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:55:55,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:55:56,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:55:59,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:01,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:02,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:08,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:10,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:12,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:14,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:16,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:20,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:56:24,517 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 [] [2022-11-18 20:56:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:42,063 INFO L93 Difference]: Finished difference Result 19956 states and 84073 transitions. [2022-11-18 20:56:42,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:56:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:56:42,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:42,219 INFO L225 Difference]: With dead ends: 19956 [2022-11-18 20:56:42,219 INFO L226 Difference]: Without dead ends: 19956 [2022-11-18 20:56:42,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=417, Invalid=2133, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:56:42,220 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1543 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 167 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:42,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 237 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2149 Invalid, 6 Unknown, 354 Unchecked, 57.1s Time] [2022-11-18 20:56:42,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19956 states. [2022-11-18 20:56:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19956 to 2120. [2022-11-18 20:56:42,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2120 states, 2101 states have (on average 3.9933365064255115) internal successors, (8390), 2119 states have internal predecessors, (8390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 8390 transitions. [2022-11-18 20:56:42,486 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 8390 transitions. Word has length 17 [2022-11-18 20:56:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:42,486 INFO L495 AbstractCegarLoop]: Abstraction has 2120 states and 8390 transitions. [2022-11-18 20:56:42,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 8390 transitions. [2022-11-18 20:56:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:56:42,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:42,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:42,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:42,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:56:42,688 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:56:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash -813611155, now seen corresponding path program 2 times [2022-11-18 20:56:42,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:56:42,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110238337] [2022-11-18 20:56:42,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:56:42,689 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 [2022-11-18 20:56:42,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:56:42,690 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:56:42,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:43,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:56:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:56:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 20:56:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:43,302 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:56:43,302 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:56:43,478 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:56:43,478 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:56:43,615 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:56:43,615 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 [2022-11-18 20:56:43,621 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 [2022-11-18 20:56:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:43,700 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 [2022-11-18 20:56:43,718 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:56:43,718 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 [2022-11-18 20:56:43,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:56:43,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:56:49,324 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:56:49,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110238337] [2022-11-18 20:56:49,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110238337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:49,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:49,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2022-11-18 20:56:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803452096] [2022-11-18 20:56:49,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:49,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:56:49,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:56:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:56:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2022-11-18 20:56:49,326 INFO L87 Difference]: Start difference. First operand 2120 states and 8390 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:51,907 INFO L93 Difference]: Finished difference Result 4368 states and 18209 transitions. [2022-11-18 20:56:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:56:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-18 20:56:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:51,924 INFO L225 Difference]: With dead ends: 4368 [2022-11-18 20:56:51,924 INFO L226 Difference]: Without dead ends: 4368 [2022-11-18 20:56:51,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=92, Invalid=179, Unknown=1, NotChecked=0, Total=272 [2022-11-18 20:56:51,925 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 226 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:51,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 17 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 3 Unchecked, 1.8s Time] [2022-11-18 20:56:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2022-11-18 20:56:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 2786. [2022-11-18 20:56:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2767 states have (on average 4.764727141308276) internal successors, (13184), 2785 states have internal predecessors, (13184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:52,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 13184 transitions. [2022-11-18 20:56:52,018 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 13184 transitions. Word has length 18 [2022-11-18 20:56:52,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:52,019 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 13184 transitions. [2022-11-18 20:56:52,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:52,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 13184 transitions. [2022-11-18 20:56:52,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:56:52,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:52,021 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:52,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:52,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:56:52,237 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:56:52,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:52,238 INFO L85 PathProgramCache]: Analyzing trace with hash -813610730, now seen corresponding path program 1 times [2022-11-18 20:56:52,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:56:52,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861168188] [2022-11-18 20:56:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:52,239 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 [2022-11-18 20:56:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:56:52,239 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:56:52,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:52,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:56:52,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:56:52,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:53,232 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 27 treesize of output 23 [2022-11-18 20:56:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:56:53,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:56:53,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861168188] [2022-11-18 20:56:53,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861168188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:56:53,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:56:53,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2022-11-18 20:56:53,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582581655] [2022-11-18 20:56:53,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:53,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:56:53,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:56:53,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:56:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:56:53,493 INFO L87 Difference]: Start difference. First operand 2786 states and 13184 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 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) [2022-11-18 20:56:58,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:58,206 INFO L93 Difference]: Finished difference Result 9722 states and 43689 transitions. [2022-11-18 20:56:58,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:56:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 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 18 [2022-11-18 20:56:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:58,286 INFO L225 Difference]: With dead ends: 9722 [2022-11-18 20:56:58,286 INFO L226 Difference]: Without dead ends: 9722 [2022-11-18 20:56:58,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:56:58,287 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 759 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:58,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 79 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-18 20:56:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9722 states. [2022-11-18 20:56:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9722 to 2786. [2022-11-18 20:56:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2767 states have (on average 4.684495843874232) internal successors, (12962), 2785 states have internal predecessors, (12962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:56:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 12962 transitions. [2022-11-18 20:56:58,453 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 12962 transitions. Word has length 18 [2022-11-18 20:56:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:58,453 INFO L495 AbstractCegarLoop]: Abstraction has 2786 states and 12962 transitions. [2022-11-18 20:56:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 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) [2022-11-18 20:56:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 12962 transitions. [2022-11-18 20:56:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:56:58,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:58,455 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:56:58,655 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:56:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -813610905, now seen corresponding path program 1 times [2022-11-18 20:56:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:56:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [15120475] [2022-11-18 20:56:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:58,657 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 [2022-11-18 20:56:58,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:56:58,658 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:56:58,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:56:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:56:59,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:56:59,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:59,369 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:56:59,370 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:56:59,568 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:56:59,568 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 21 treesize of output 21 [2022-11-18 20:56:59,591 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 [2022-11-18 20:56:59,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:56:59,741 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:56:59,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-18 20:56:59,763 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:56:59,764 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 [2022-11-18 20:57:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:57:00,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:00,847 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 [2022-11-18 20:57:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:57:01,395 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:01,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [15120475] [2022-11-18 20:57:01,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [15120475] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:01,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:01,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 20:57:01,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382901800] [2022-11-18 20:57:01,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:57:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:57:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:57:01,397 INFO L87 Difference]: Start difference. First operand 2786 states and 12962 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-18 20:57:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:02,316 INFO L93 Difference]: Finished difference Result 2914 states and 13280 transitions. [2022-11-18 20:57:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:57:02,319 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 18 [2022-11-18 20:57:02,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:02,334 INFO L225 Difference]: With dead ends: 2914 [2022-11-18 20:57:02,335 INFO L226 Difference]: Without dead ends: 2914 [2022-11-18 20:57:02,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:57:02,335 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:02,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 313 Unchecked, 0.7s Time] [2022-11-18 20:57:02,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2022-11-18 20:57:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 2838. [2022-11-18 20:57:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2819 states have (on average 4.648102163887904) internal successors, (13103), 2837 states have internal predecessors, (13103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 13103 transitions. [2022-11-18 20:57:02,439 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 13103 transitions. Word has length 18 [2022-11-18 20:57:02,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:02,440 INFO L495 AbstractCegarLoop]: Abstraction has 2838 states and 13103 transitions. [2022-11-18 20:57:02,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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) [2022-11-18 20:57:02,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 13103 transitions. [2022-11-18 20:57:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:57:02,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:02,442 INFO L195 NwaCegarLoop]: trace histogram [13, 3, 1, 1, 1] [2022-11-18 20:57:02,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:02,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:02,655 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:02,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1310761072, now seen corresponding path program 3 times [2022-11-18 20:57:02,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:02,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1761782767] [2022-11-18 20:57:02,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:57:02,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:02,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:02,657 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:02,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:03,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:57:03,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:03,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:57:03,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:03,326 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:57:03,327 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:57:03,486 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 13 treesize of output 9 [2022-11-18 20:57:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:57:03,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 40 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:57:04,498 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:04,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1761782767] [2022-11-18 20:57:04,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1761782767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:04,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:04,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-11-18 20:57:04,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236239421] [2022-11-18 20:57:04,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:04,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:57:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:04,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:57:04,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:57:04,500 INFO L87 Difference]: Start difference. First operand 2838 states and 13103 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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) [2022-11-18 20:57:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:09,267 INFO L93 Difference]: Finished difference Result 7832 states and 37624 transitions. [2022-11-18 20:57:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:57:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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 19 [2022-11-18 20:57:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:09,298 INFO L225 Difference]: With dead ends: 7832 [2022-11-18 20:57:09,298 INFO L226 Difference]: Without dead ends: 7832 [2022-11-18 20:57:09,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=176, Invalid=580, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:57:09,299 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 674 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:09,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [674 Valid, 111 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-18 20:57:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2022-11-18 20:57:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 2852. [2022-11-18 20:57:09,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2833 states have (on average 4.630780091775503) internal successors, (13119), 2851 states have internal predecessors, (13119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 13119 transitions. [2022-11-18 20:57:09,437 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 13119 transitions. Word has length 19 [2022-11-18 20:57:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 2852 states and 13119 transitions. [2022-11-18 20:57:09,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 17 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) [2022-11-18 20:57:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 13119 transitions. [2022-11-18 20:57:09,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:57:09,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:09,439 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:09,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:09,656 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:09,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash 363578446, now seen corresponding path program 4 times [2022-11-18 20:57:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:09,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182197065] [2022-11-18 20:57:09,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:57:09,657 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 [2022-11-18 20:57:09,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:09,658 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:09,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:10,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:57:10,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:10,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:57:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:10,294 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:57:10,294 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:57:10,401 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 13 treesize of output 9 [2022-11-18 20:57:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:57:10,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:11,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:57:11,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:11,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182197065] [2022-11-18 20:57:11,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182197065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:11,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:11,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 20:57:11,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167870479] [2022-11-18 20:57:11,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:11,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:57:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:11,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:57:11,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:57:11,194 INFO L87 Difference]: Start difference. First operand 2852 states and 13119 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2022-11-18 20:57:18,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:18,364 INFO L93 Difference]: Finished difference Result 4254 states and 19136 transitions. [2022-11-18 20:57:18,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:57:18,367 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 19 [2022-11-18 20:57:18,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:18,402 INFO L225 Difference]: With dead ends: 4254 [2022-11-18 20:57:18,402 INFO L226 Difference]: Without dead ends: 4254 [2022-11-18 20:57:18,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:57:18,404 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 510 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:18,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 166 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-18 20:57:18,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2022-11-18 20:57:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 3768. [2022-11-18 20:57:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3768 states, 3749 states have (on average 4.624433182181916) internal successors, (17337), 3767 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3768 states to 3768 states and 17337 transitions. [2022-11-18 20:57:18,514 INFO L78 Accepts]: Start accepts. Automaton has 3768 states and 17337 transitions. Word has length 19 [2022-11-18 20:57:18,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:18,514 INFO L495 AbstractCegarLoop]: Abstraction has 3768 states and 17337 transitions. [2022-11-18 20:57:18,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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) [2022-11-18 20:57:18,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3768 states and 17337 transitions. [2022-11-18 20:57:18,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:57:18,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:18,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:18,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:18,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:18,716 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:18,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash 547638357, now seen corresponding path program 1 times [2022-11-18 20:57:18,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:18,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482157014] [2022-11-18 20:57:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:18,717 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 [2022-11-18 20:57:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:18,718 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:18,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:19,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:57:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:19,523 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:57:19,523 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:57:19,681 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:57:19,682 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 21 treesize of output 21 [2022-11-18 20:57:19,704 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 [2022-11-18 20:57:19,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:19,861 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:57:19,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-18 20:57:19,884 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:57:19,885 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 [2022-11-18 20:57:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:57:20,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:22,999 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 [2022-11-18 20:57:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:57:23,543 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:23,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482157014] [2022-11-18 20:57:23,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482157014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:23,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:23,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 20:57:23,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854571939] [2022-11-18 20:57:23,544 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:23,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:57:23,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:23,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:57:23,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:57:23,546 INFO L87 Difference]: Start difference. First operand 3768 states and 17337 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:25,533 INFO L93 Difference]: Finished difference Result 5193 states and 24008 transitions. [2022-11-18 20:57:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:57:25,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-18 20:57:25,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:25,551 INFO L225 Difference]: With dead ends: 5193 [2022-11-18 20:57:25,551 INFO L226 Difference]: Without dead ends: 5193 [2022-11-18 20:57:25,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:57:25,551 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 91 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 405 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:25,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 78 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 405 Unchecked, 1.5s Time] [2022-11-18 20:57:25,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2022-11-18 20:57:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 4210. [2022-11-18 20:57:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4191 states have (on average 4.567406346933906) internal successors, (19142), 4209 states have internal predecessors, (19142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 19142 transitions. [2022-11-18 20:57:25,663 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 19142 transitions. Word has length 19 [2022-11-18 20:57:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:25,663 INFO L495 AbstractCegarLoop]: Abstraction has 4210 states and 19142 transitions. [2022-11-18 20:57:25,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 19142 transitions. [2022-11-18 20:57:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:57:25,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:25,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:25,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Ended with exit code 0 [2022-11-18 20:57:25,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:25,867 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:25,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:25,867 INFO L85 PathProgramCache]: Analyzing trace with hash 547873016, now seen corresponding path program 2 times [2022-11-18 20:57:25,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:25,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509600417] [2022-11-18 20:57:25,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:57:25,868 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 [2022-11-18 20:57:25,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:25,869 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:25,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:26,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:57:26,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:26,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:57:26,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:26,287 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 [2022-11-18 20:57:26,294 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 [2022-11-18 20:57:26,363 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:57:26,363 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 [2022-11-18 20:57:26,375 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 16 treesize of output 18 [2022-11-18 20:57:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:57:26,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:26,696 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:26,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509600417] [2022-11-18 20:57:26,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509600417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:26,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:26,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:57:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142448511] [2022-11-18 20:57:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:57:26,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:57:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:57:26,698 INFO L87 Difference]: Start difference. First operand 4210 states and 19142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-18 20:57:26,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:26,949 INFO L93 Difference]: Finished difference Result 4203 states and 19098 transitions. [2022-11-18 20:57:26,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:57:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 19 [2022-11-18 20:57:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:26,963 INFO L225 Difference]: With dead ends: 4203 [2022-11-18 20:57:26,963 INFO L226 Difference]: Without dead ends: 4203 [2022-11-18 20:57:26,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:57:26,964 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:26,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-11-18 20:57:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2022-11-18 20:57:27,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4202. [2022-11-18 20:57:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4202 states, 4183 states have (on average 4.564666507291418) internal successors, (19094), 4201 states have internal predecessors, (19094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:27,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4202 states to 4202 states and 19094 transitions. [2022-11-18 20:57:27,096 INFO L78 Accepts]: Start accepts. Automaton has 4202 states and 19094 transitions. Word has length 19 [2022-11-18 20:57:27,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:27,097 INFO L495 AbstractCegarLoop]: Abstraction has 4202 states and 19094 transitions. [2022-11-18 20:57:27,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-18 20:57:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4202 states and 19094 transitions. [2022-11-18 20:57:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-18 20:57:27,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:27,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:27,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:27,299 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 547872841, now seen corresponding path program 2 times [2022-11-18 20:57:27,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:27,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1304902894] [2022-11-18 20:57:27,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:57:27,300 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 [2022-11-18 20:57:27,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:27,302 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:27,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:27,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:57:27,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:27,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:57:27,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:27,842 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:57:27,842 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:57:28,025 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:57:28,025 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:57:28,185 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-18 20:57:28,185 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 [2022-11-18 20:57:28,210 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 16 treesize of output 18 [2022-11-18 20:57:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:28,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:57:28,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 20:57:28,398 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-18 20:57:28,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-18 20:57:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:57:29,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:57:29,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:29,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1304902894] [2022-11-18 20:57:29,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1304902894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:57:29,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:57:29,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:57:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561561549] [2022-11-18 20:57:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:57:29,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:57:29,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:57:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:57:29,092 INFO L87 Difference]: Start difference. First operand 4202 states and 19094 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-18 20:57:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:29,497 INFO L93 Difference]: Finished difference Result 4195 states and 19042 transitions. [2022-11-18 20:57:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:57:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 19 [2022-11-18 20:57:29,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:29,514 INFO L225 Difference]: With dead ends: 4195 [2022-11-18 20:57:29,515 INFO L226 Difference]: Without dead ends: 4195 [2022-11-18 20:57:29,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:57:29,515 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:29,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-11-18 20:57:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-11-18 20:57:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 4194. [2022-11-18 20:57:29,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4194 states, 4175 states have (on average 4.56) internal successors, (19038), 4193 states have internal predecessors, (19038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:57:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 19038 transitions. [2022-11-18 20:57:29,650 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 19038 transitions. Word has length 19 [2022-11-18 20:57:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:29,650 INFO L495 AbstractCegarLoop]: Abstraction has 4194 states and 19038 transitions. [2022-11-18 20:57:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-18 20:57:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 19038 transitions. [2022-11-18 20:57:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:57:29,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:29,652 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-18 20:57:29,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:29,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:57:29,853 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:57:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash 808829413, now seen corresponding path program 4 times [2022-11-18 20:57:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:57:29,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877649458] [2022-11-18 20:57:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:57:29,854 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 [2022-11-18 20:57:29,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:57:29,855 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:57:29,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:57:30,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:57:30,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-18 20:57:30,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:30,395 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 [2022-11-18 20:57:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 48 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:57:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:57:36,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:57:36,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877649458] [2022-11-18 20:57:36,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877649458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:57:36,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:57:36,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 33 [2022-11-18 20:57:36,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008406371] [2022-11-18 20:57:36,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:36,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-18 20:57:36,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:57:36,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-18 20:57:36,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=979, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:57:36,766 INFO L87 Difference]: Start difference. First operand 4194 states and 19038 transitions. Second operand has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:08,194 INFO L93 Difference]: Finished difference Result 16722 states and 79332 transitions. [2022-11-18 20:58:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:58:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-11-18 20:58:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:08,354 INFO L225 Difference]: With dead ends: 16722 [2022-11-18 20:58:08,354 INFO L226 Difference]: Without dead ends: 16722 [2022-11-18 20:58:08,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:58:08,355 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 971 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 2680 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 971 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:08,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [971 Valid, 303 Invalid, 2955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2680 Invalid, 0 Unknown, 123 Unchecked, 25.8s Time] [2022-11-18 20:58:08,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16722 states. [2022-11-18 20:58:08,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16722 to 4199. [2022-11-18 20:58:08,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4199 states, 4180 states have (on average 4.55622009569378) internal successors, (19045), 4198 states have internal predecessors, (19045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 19045 transitions. [2022-11-18 20:58:08,662 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 19045 transitions. Word has length 20 [2022-11-18 20:58:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:08,662 INFO L495 AbstractCegarLoop]: Abstraction has 4199 states and 19045 transitions. [2022-11-18 20:58:08,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 19045 transitions. [2022-11-18 20:58:08,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:08,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:08,665 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:08,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:08,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:08,866 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1507239737, now seen corresponding path program 1 times [2022-11-18 20:58:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:08,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899740520] [2022-11-18 20:58:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:08,867 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 [2022-11-18 20:58:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:08,868 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:08,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:58:09,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:09,700 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:09,701 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:09,889 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:58:09,890 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 21 treesize of output 21 [2022-11-18 20:58:09,915 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 [2022-11-18 20:58:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:10,077 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:58:10,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-18 20:58:10,100 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:58:10,100 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 [2022-11-18 20:58:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:58:10,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:13,644 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 [2022-11-18 20:58:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:58:14,124 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:14,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899740520] [2022-11-18 20:58:14,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899740520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:14,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:14,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 20:58:14,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707662726] [2022-11-18 20:58:14,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:14,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:58:14,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:14,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:58:14,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:58:14,126 INFO L87 Difference]: Start difference. First operand 4199 states and 19045 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:15,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:15,968 INFO L93 Difference]: Finished difference Result 5062 states and 22682 transitions. [2022-11-18 20:58:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:58:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-11-18 20:58:15,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:15,986 INFO L225 Difference]: With dead ends: 5062 [2022-11-18 20:58:15,986 INFO L226 Difference]: Without dead ends: 5062 [2022-11-18 20:58:15,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:58:15,987 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:15,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 333 Unchecked, 1.3s Time] [2022-11-18 20:58:15,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5062 states. [2022-11-18 20:58:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5062 to 4321. [2022-11-18 20:58:16,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 4302 states have (on average 4.573221757322176) internal successors, (19674), 4320 states have internal predecessors, (19674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 19674 transitions. [2022-11-18 20:58:16,119 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 19674 transitions. Word has length 20 [2022-11-18 20:58:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:16,119 INFO L495 AbstractCegarLoop]: Abstraction has 4321 states and 19674 transitions. [2022-11-18 20:58:16,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 19674 transitions. [2022-11-18 20:58:16,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:16,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:16,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:16,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:16,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:16,322 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1507237877, now seen corresponding path program 2 times [2022-11-18 20:58:16,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:16,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164868116] [2022-11-18 20:58:16,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:16,324 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 [2022-11-18 20:58:16,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:16,325 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:16,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:16,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:58:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:58:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:16,798 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:16,798 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:16,871 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:58:16,871 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 16 treesize of output 18 [2022-11-18 20:58:16,888 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 [2022-11-18 20:58:16,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:16,995 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-18 20:58:16,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 20:58:17,014 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:58:17,016 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 [2022-11-18 20:58:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:58:17,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:17,436 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:17,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164868116] [2022-11-18 20:58:17,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164868116] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:17,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:17,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:58:17,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382980928] [2022-11-18 20:58:17,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:17,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:58:17,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:17,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:58:17,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:58:17,438 INFO L87 Difference]: Start difference. First operand 4321 states and 19674 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:17,749 INFO L93 Difference]: Finished difference Result 4306 states and 19554 transitions. [2022-11-18 20:58:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:58:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 20:58:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:17,766 INFO L225 Difference]: With dead ends: 4306 [2022-11-18 20:58:17,767 INFO L226 Difference]: Without dead ends: 4306 [2022-11-18 20:58:17,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:58:17,767 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:17,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-18 20:58:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2022-11-18 20:58:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 4287. [2022-11-18 20:58:17,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4268 states have (on average 4.557638238050609) internal successors, (19452), 4286 states have internal predecessors, (19452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 19452 transitions. [2022-11-18 20:58:17,877 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 19452 transitions. Word has length 20 [2022-11-18 20:58:17,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:17,878 INFO L495 AbstractCegarLoop]: Abstraction has 4287 states and 19452 transitions. [2022-11-18 20:58:17,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 19452 transitions. [2022-11-18 20:58:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:17,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:17,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:17,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:18,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:18,080 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash -203072822, now seen corresponding path program 1 times [2022-11-18 20:58:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:18,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1775661738] [2022-11-18 20:58:18,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:18,082 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 [2022-11-18 20:58:18,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:18,083 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:18,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:58:18,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:18,635 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 [2022-11-18 20:58:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:58:18,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:58:20,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:20,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1775661738] [2022-11-18 20:58:20,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1775661738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:20,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:20,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-18 20:58:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774359752] [2022-11-18 20:58:20,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:20,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:58:20,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:20,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:58:20,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:58:20,256 INFO L87 Difference]: Start difference. First operand 4287 states and 19452 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:25,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:25,476 INFO L93 Difference]: Finished difference Result 8425 states and 34056 transitions. [2022-11-18 20:58:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:58:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 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 20 [2022-11-18 20:58:25,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:25,507 INFO L225 Difference]: With dead ends: 8425 [2022-11-18 20:58:25,507 INFO L226 Difference]: Without dead ends: 8425 [2022-11-18 20:58:25,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:58:25,508 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 348 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:25,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 35 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 20:58:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8425 states. [2022-11-18 20:58:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8425 to 4891. [2022-11-18 20:58:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4872 states have (on average 4.744663382594417) internal successors, (23116), 4890 states have internal predecessors, (23116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:25,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 23116 transitions. [2022-11-18 20:58:25,702 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 23116 transitions. Word has length 20 [2022-11-18 20:58:25,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:25,702 INFO L495 AbstractCegarLoop]: Abstraction has 4891 states and 23116 transitions. [2022-11-18 20:58:25,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:25,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 23116 transitions. [2022-11-18 20:58:25,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:25,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:25,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:25,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:25,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:25,905 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:25,906 INFO L85 PathProgramCache]: Analyzing trace with hash -203072997, now seen corresponding path program 2 times [2022-11-18 20:58:25,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:25,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784178454] [2022-11-18 20:58:25,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:25,906 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 [2022-11-18 20:58:25,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:25,907 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:25,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:26,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:58:26,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:26,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:58:26,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:26,406 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:26,406 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:26,471 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:58:26,471 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 16 treesize of output 18 [2022-11-18 20:58:26,489 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 [2022-11-18 20:58:26,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:26,596 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-18 20:58:26,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 20:58:26,617 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:58:26,617 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 [2022-11-18 20:58:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:58:27,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:27,068 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:27,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784178454] [2022-11-18 20:58:27,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784178454] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:27,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:27,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:58:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558760036] [2022-11-18 20:58:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:58:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:58:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:58:27,070 INFO L87 Difference]: Start difference. First operand 4891 states and 23116 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-18 20:58:27,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:27,304 INFO L93 Difference]: Finished difference Result 4885 states and 23059 transitions. [2022-11-18 20:58:27,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:58:27,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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 20 [2022-11-18 20:58:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:27,327 INFO L225 Difference]: With dead ends: 4885 [2022-11-18 20:58:27,328 INFO L226 Difference]: Without dead ends: 4885 [2022-11-18 20:58:27,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:58:27,328 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:27,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-18 20:58:27,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2022-11-18 20:58:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 4827. [2022-11-18 20:58:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4808 states have (on average 4.752911813643927) internal successors, (22852), 4826 states have internal predecessors, (22852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 22852 transitions. [2022-11-18 20:58:27,498 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 22852 transitions. Word has length 20 [2022-11-18 20:58:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:27,498 INFO L495 AbstractCegarLoop]: Abstraction has 4827 states and 22852 transitions. [2022-11-18 20:58:27,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2022-11-18 20:58:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 22852 transitions. [2022-11-18 20:58:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:27,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:27,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:27,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:27,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:27,701 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -196369216, now seen corresponding path program 1 times [2022-11-18 20:58:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:27,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739861765] [2022-11-18 20:58:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:27,702 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 [2022-11-18 20:58:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:27,703 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:27,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:58:28,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:28,491 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:28,492 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:28,657 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 [2022-11-18 20:58:28,681 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 20:58:28,681 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 21 treesize of output 21 [2022-11-18 20:58:28,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:58:28,907 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:58:28,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-18 20:58:28,931 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:58:28,931 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 [2022-11-18 20:58:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:58:29,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:32,201 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 [2022-11-18 20:58:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:58:32,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:32,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739861765] [2022-11-18 20:58:32,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739861765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:32,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:32,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 20:58:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122293115] [2022-11-18 20:58:32,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:32,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:58:32,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:58:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:58:32,700 INFO L87 Difference]: Start difference. First operand 4827 states and 22852 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:34,706 INFO L93 Difference]: Finished difference Result 5208 states and 24174 transitions. [2022-11-18 20:58:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:58:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 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 20 [2022-11-18 20:58:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:34,728 INFO L225 Difference]: With dead ends: 5208 [2022-11-18 20:58:34,728 INFO L226 Difference]: Without dead ends: 5208 [2022-11-18 20:58:34,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:58:34,728 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:34,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 84 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 130 Unchecked, 1.4s Time] [2022-11-18 20:58:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2022-11-18 20:58:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4891. [2022-11-18 20:58:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4891 states, 4872 states have (on average 4.749589490968801) internal successors, (23140), 4890 states have internal predecessors, (23140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4891 states to 4891 states and 23140 transitions. [2022-11-18 20:58:34,858 INFO L78 Accepts]: Start accepts. Automaton has 4891 states and 23140 transitions. Word has length 20 [2022-11-18 20:58:34,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:34,859 INFO L495 AbstractCegarLoop]: Abstraction has 4891 states and 23140 transitions. [2022-11-18 20:58:34,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4891 states and 23140 transitions. [2022-11-18 20:58:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-18 20:58:34,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:34,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:34,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:35,062 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -213325906, now seen corresponding path program 2 times [2022-11-18 20:58:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:35,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319295630] [2022-11-18 20:58:35,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:58:35,063 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 [2022-11-18 20:58:35,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:35,064 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:35,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:58:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:35,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:58:35,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:35,631 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 20:58:35,632 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 20:58:35,782 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 20:58:35,782 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 20:58:35,882 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 20:58:35,883 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 [2022-11-18 20:58:35,890 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 16 treesize of output 18 [2022-11-18 20:58:36,027 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-18 20:58:36,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 20:58:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:58:36,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:58:36,394 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:36,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319295630] [2022-11-18 20:58:36,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319295630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:58:36,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:58:36,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:58:36,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262029849] [2022-11-18 20:58:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:58:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:58:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:58:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:58:36,395 INFO L87 Difference]: Start difference. First operand 4891 states and 23140 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:36,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:36,698 INFO L93 Difference]: Finished difference Result 4868 states and 22904 transitions. [2022-11-18 20:58:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:58:36,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-18 20:58:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:36,759 INFO L225 Difference]: With dead ends: 4868 [2022-11-18 20:58:36,759 INFO L226 Difference]: Without dead ends: 4868 [2022-11-18 20:58:36,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:58:36,760 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:36,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-18 20:58:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2022-11-18 20:58:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4867. [2022-11-18 20:58:36,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4867 states, 4848 states have (on average 4.723597359735973) internal successors, (22900), 4866 states have internal predecessors, (22900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:36,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 22900 transitions. [2022-11-18 20:58:36,850 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 22900 transitions. Word has length 20 [2022-11-18 20:58:36,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:36,850 INFO L495 AbstractCegarLoop]: Abstraction has 4867 states and 22900 transitions. [2022-11-18 20:58:36,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:36,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 22900 transitions. [2022-11-18 20:58:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:58:36,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:36,852 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1] [2022-11-18 20:58:36,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:37,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:37,052 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 20:58:37,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:37,053 INFO L85 PathProgramCache]: Analyzing trace with hash 380435790, now seen corresponding path program 5 times [2022-11-18 20:58:37,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:58:37,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677534683] [2022-11-18 20:58:37,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:58:37,053 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:58:37,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:58:37,054 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 20:58:37,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 20:58:37,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 20:58:37,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:58:37,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:37,787 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 [2022-11-18 20:58:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:58:38,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:58:44,873 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:58:44,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677534683] [2022-11-18 20:58:44,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677534683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:58:44,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:58:44,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2022-11-18 20:58:44,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11761422] [2022-11-18 20:58:44,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:58:44,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:58:44,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:58:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:58:44,875 INFO L87 Difference]: Start difference. First operand 4867 states and 22900 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:58:51,508 WARN L233 SmtUtils]: Spent 6.04s on a formula simplification. DAG size of input: 152 DAG size of output: 140 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:59:00,674 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 [] [2022-11-18 20:59:02,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:04,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:06,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:08,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:10,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:12,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:14,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:26,702 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 151 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:59:47,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:49,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:51,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:53,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:55,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:57,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 20:59:59,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:01,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:03,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:05,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:07,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-18 21:00:09,647 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 [] [2022-11-18 21:00:26,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:26,046 INFO L93 Difference]: Finished difference Result 37473 states and 188374 transitions. [2022-11-18 21:00:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 21:00:26,049 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 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 21 [2022-11-18 21:00:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:26,291 INFO L225 Difference]: With dead ends: 37473 [2022-11-18 21:00:26,291 INFO L226 Difference]: Without dead ends: 37473 [2022-11-18 21:00:26,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=905, Invalid=2517, Unknown=0, NotChecked=0, Total=3422 [2022-11-18 21:00:26,292 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 3637 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 5142 mSolverCounterSat, 441 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3637 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 5142 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:26,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3637 Valid, 585 Invalid, 5603 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [441 Valid, 5142 Invalid, 20 Unknown, 0 Unchecked, 63.1s Time] [2022-11-18 21:00:26,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37473 states. [2022-11-18 21:00:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37473 to 4866. [2022-11-18 21:00:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4866 states, 4847 states have (on average 4.7247782133278315) internal successors, (22901), 4865 states have internal predecessors, (22901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4866 states to 4866 states and 22901 transitions. [2022-11-18 21:00:26,995 INFO L78 Accepts]: Start accepts. Automaton has 4866 states and 22901 transitions. Word has length 21 [2022-11-18 21:00:26,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:26,995 INFO L495 AbstractCegarLoop]: Abstraction has 4866 states and 22901 transitions. [2022-11-18 21:00:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4866 states and 22901 transitions. [2022-11-18 21:00:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:00:26,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:26,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:27,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:27,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:27,203 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash 513004185, now seen corresponding path program 1 times [2022-11-18 21:00:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:27,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490022865] [2022-11-18 21:00:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:27,204 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 [2022-11-18 21:00:27,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:27,205 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:00:27,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 21:00:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:28,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:28,132 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:28,277 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 [2022-11-18 21:00:28,303 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 21:00:28,303 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 21 treesize of output 21 [2022-11-18 21:00:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:28,552 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 21:00:28,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-18 21:00:28,576 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:00:28,576 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 [2022-11-18 21:00:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:00:29,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:31,856 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 [2022-11-18 21:00:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:00:32,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:32,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490022865] [2022-11-18 21:00:32,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490022865] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:32,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:32,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:00:32,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760531559] [2022-11-18 21:00:32,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:32,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:00:32,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:00:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:00:32,420 INFO L87 Difference]: Start difference. First operand 4866 states and 22901 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:34,035 INFO L93 Difference]: Finished difference Result 6365 states and 30003 transitions. [2022-11-18 21:00:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 21:00:34,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 21 [2022-11-18 21:00:34,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:34,064 INFO L225 Difference]: With dead ends: 6365 [2022-11-18 21:00:34,064 INFO L226 Difference]: Without dead ends: 6365 [2022-11-18 21:00:34,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-18 21:00:34,065 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:34,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 95 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 416 Unchecked, 1.2s Time] [2022-11-18 21:00:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6365 states. [2022-11-18 21:00:34,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6365 to 4884. [2022-11-18 21:00:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4884 states, 4865 states have (on average 4.726824254881809) internal successors, (22996), 4883 states have internal predecessors, (22996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4884 states to 4884 states and 22996 transitions. [2022-11-18 21:00:34,221 INFO L78 Accepts]: Start accepts. Automaton has 4884 states and 22996 transitions. Word has length 21 [2022-11-18 21:00:34,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:34,222 INFO L495 AbstractCegarLoop]: Abstraction has 4884 states and 22996 transitions. [2022-11-18 21:00:34,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 4884 states and 22996 transitions. [2022-11-18 21:00:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:00:34,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:34,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:34,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-18 21:00:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:34,425 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash 513006045, now seen corresponding path program 2 times [2022-11-18 21:00:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:34,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429436724] [2022-11-18 21:00:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:00:34,426 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 [2022-11-18 21:00:34,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:34,427 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:00:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:34,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:00:34,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:00:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:35,008 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:35,009 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:35,065 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 [2022-11-18 21:00:35,094 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 21:00:35,094 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 16 treesize of output 18 [2022-11-18 21:00:35,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:35,235 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-18 21:00:35,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 21:00:35,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:00:35,263 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 [2022-11-18 21:00:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 21:00:35,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:00:35,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:35,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429436724] [2022-11-18 21:00:35,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429436724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:00:35,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:00:35,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:00:35,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882935446] [2022-11-18 21:00:35,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:00:35,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:00:35,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:35,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:00:35,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:00:35,749 INFO L87 Difference]: Start difference. First operand 4884 states and 22996 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-11-18 21:00:35,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:35,991 INFO L93 Difference]: Finished difference Result 4870 states and 22863 transitions. [2022-11-18 21:00:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:00:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 21 [2022-11-18 21:00:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:36,008 INFO L225 Difference]: With dead ends: 4870 [2022-11-18 21:00:36,008 INFO L226 Difference]: Without dead ends: 4870 [2022-11-18 21:00:36,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:00:36,009 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:36,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 9 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-18 21:00:36,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2022-11-18 21:00:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4858. [2022-11-18 21:00:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4858 states, 4839 states have (on average 4.713783839636289) internal successors, (22810), 4857 states have internal predecessors, (22810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4858 states to 4858 states and 22810 transitions. [2022-11-18 21:00:36,122 INFO L78 Accepts]: Start accepts. Automaton has 4858 states and 22810 transitions. Word has length 21 [2022-11-18 21:00:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:36,122 INFO L495 AbstractCegarLoop]: Abstraction has 4858 states and 22810 transitions. [2022-11-18 21:00:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-11-18 21:00:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4858 states and 22810 transitions. [2022-11-18 21:00:36,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:00:36,125 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:36,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:36,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:36,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:36,326 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2000853714, now seen corresponding path program 1 times [2022-11-18 21:00:36,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:36,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360865822] [2022-11-18 21:00:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:00:36,327 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 [2022-11-18 21:00:36,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:36,328 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:00:36,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:00:36,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 21:00:36,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:37,180 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:37,180 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:37,331 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 21:00:37,332 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 21 treesize of output 21 [2022-11-18 21:00:37,357 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 [2022-11-18 21:00:37,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:00:37,539 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 21:00:37,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-11-18 21:00:37,562 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:00:37,562 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 [2022-11-18 21:00:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:00:38,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:40,930 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 [2022-11-18 21:00:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:00:41,461 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:41,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360865822] [2022-11-18 21:00:41,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360865822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:41,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:41,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2022-11-18 21:00:41,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605845472] [2022-11-18 21:00:41,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:41,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:00:41,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:41,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:00:41,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=195, Unknown=1, NotChecked=0, Total=240 [2022-11-18 21:00:41,463 INFO L87 Difference]: Start difference. First operand 4858 states and 22810 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:44,950 INFO L93 Difference]: Finished difference Result 7611 states and 35076 transitions. [2022-11-18 21:00:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 21:00:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 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 21 [2022-11-18 21:00:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:45,027 INFO L225 Difference]: With dead ends: 7611 [2022-11-18 21:00:45,027 INFO L226 Difference]: Without dead ends: 7611 [2022-11-18 21:00:45,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2022-11-18 21:00:45,028 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 818 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:45,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 97 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 281 Invalid, 0 Unknown, 818 Unchecked, 2.9s Time] [2022-11-18 21:00:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7611 states. [2022-11-18 21:00:45,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7611 to 5372. [2022-11-18 21:00:45,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5372 states, 5353 states have (on average 4.741827012889968) internal successors, (25383), 5371 states have internal predecessors, (25383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:45,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5372 states to 5372 states and 25383 transitions. [2022-11-18 21:00:45,162 INFO L78 Accepts]: Start accepts. Automaton has 5372 states and 25383 transitions. Word has length 21 [2022-11-18 21:00:45,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:45,162 INFO L495 AbstractCegarLoop]: Abstraction has 5372 states and 25383 transitions. [2022-11-18 21:00:45,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 5372 states and 25383 transitions. [2022-11-18 21:00:45,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:00:45,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:45,164 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:45,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:00:45,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:45,364 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1774949617, now seen corresponding path program 3 times [2022-11-18 21:00:45,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:45,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1452452399] [2022-11-18 21:00:45,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 21:00:45,366 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 [2022-11-18 21:00:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:45,367 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:00:45,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:46,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 21:00:46,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:46,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-18 21:00:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:46,613 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:46,613 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:46,725 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 [2022-11-18 21:00:46,848 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 [2022-11-18 21:00:47,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:00:47,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:00:48,262 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:48,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1452452399] [2022-11-18 21:00:48,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1452452399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:48,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:48,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2022-11-18 21:00:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470881588] [2022-11-18 21:00:48,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:48,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:00:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:00:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:00:48,263 INFO L87 Difference]: Start difference. First operand 5372 states and 25383 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:00:53,935 INFO L93 Difference]: Finished difference Result 6096 states and 27847 transitions. [2022-11-18 21:00:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 21:00:53,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 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 21 [2022-11-18 21:00:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:00:53,959 INFO L225 Difference]: With dead ends: 6096 [2022-11-18 21:00:53,959 INFO L226 Difference]: Without dead ends: 6096 [2022-11-18 21:00:53,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-11-18 21:00:53,960 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 330 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:00:53,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 202 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 694 Invalid, 0 Unknown, 635 Unchecked, 4.3s Time] [2022-11-18 21:00:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6096 states. [2022-11-18 21:00:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6096 to 5700. [2022-11-18 21:00:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5700 states, 5681 states have (on average 4.732793522267206) internal successors, (26887), 5699 states have internal predecessors, (26887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5700 states to 5700 states and 26887 transitions. [2022-11-18 21:00:54,125 INFO L78 Accepts]: Start accepts. Automaton has 5700 states and 26887 transitions. Word has length 21 [2022-11-18 21:00:54,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:00:54,125 INFO L495 AbstractCegarLoop]: Abstraction has 5700 states and 26887 transitions. [2022-11-18 21:00:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:00:54,125 INFO L276 IsEmpty]: Start isEmpty. Operand 5700 states and 26887 transitions. [2022-11-18 21:00:54,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 21:00:54,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:00:54,127 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:00:54,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:00:54,328 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:00:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:00:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 539931901, now seen corresponding path program 4 times [2022-11-18 21:00:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:00:54,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1856171244] [2022-11-18 21:00:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:00:54,329 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 [2022-11-18 21:00:54,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:00:54,330 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:00:54,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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 [2022-11-18 21:00:54,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:00:54,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:00:54,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 21:00:54,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:00:55,070 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:00:55,071 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:00:55,228 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 [2022-11-18 21:00:55,551 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 21:00:55,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:00:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 21:00:56,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:00:56,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1856171244] [2022-11-18 21:00:56,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1856171244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:00:56,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:00:56,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-18 21:00:56,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260415059] [2022-11-18 21:00:56,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:00:56,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:00:56,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:00:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:00:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:00:56,121 INFO L87 Difference]: Start difference. First operand 5700 states and 26887 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2022-11-18 21:01:03,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:03,268 INFO L93 Difference]: Finished difference Result 5293 states and 23810 transitions. [2022-11-18 21:01:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 21:01:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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 21 [2022-11-18 21:01:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:03,296 INFO L225 Difference]: With dead ends: 5293 [2022-11-18 21:01:03,296 INFO L226 Difference]: Without dead ends: 5293 [2022-11-18 21:01:03,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:01:03,297 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 343 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:03,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 181 Invalid, 1313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-18 21:01:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2022-11-18 21:01:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5131. [2022-11-18 21:01:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 5112 states have (on average 4.578638497652582) internal successors, (23406), 5130 states have internal predecessors, (23406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:03,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 23406 transitions. [2022-11-18 21:01:03,460 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 23406 transitions. Word has length 21 [2022-11-18 21:01:03,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:03,460 INFO L495 AbstractCegarLoop]: Abstraction has 5131 states and 23406 transitions. [2022-11-18 21:01:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2022-11-18 21:01:03,460 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 23406 transitions. [2022-11-18 21:01:03,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:03,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:03,462 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:03,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:03,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:03,663 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 26057680, now seen corresponding path program 5 times [2022-11-18 21:01:03,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1804500936] [2022-11-18 21:01:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 21:01:03,664 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 [2022-11-18 21:01:03,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:03,666 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:03,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-18 21:01:04,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 21:01:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:04,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 21:01:04,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 21:01:04,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 21:01:06,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:06,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1804500936] [2022-11-18 21:01:06,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1804500936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:06,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:06,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2022-11-18 21:01:06,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915874341] [2022-11-18 21:01:06,129 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:06,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 21:01:06,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 21:01:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:01:06,130 INFO L87 Difference]: Start difference. First operand 5131 states and 23406 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:18,641 INFO L93 Difference]: Finished difference Result 10124 states and 45916 transitions. [2022-11-18 21:01:18,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 21:01:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 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 22 [2022-11-18 21:01:18,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:18,743 INFO L225 Difference]: With dead ends: 10124 [2022-11-18 21:01:18,744 INFO L226 Difference]: Without dead ends: 10124 [2022-11-18 21:01:18,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:01:18,744 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 1178 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:18,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 387 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2847 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-11-18 21:01:18,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10124 states. [2022-11-18 21:01:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10124 to 7419. [2022-11-18 21:01:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7419 states, 7400 states have (on average 4.666621621621622) internal successors, (34533), 7418 states have internal predecessors, (34533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:19,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7419 states to 7419 states and 34533 transitions. [2022-11-18 21:01:19,003 INFO L78 Accepts]: Start accepts. Automaton has 7419 states and 34533 transitions. Word has length 22 [2022-11-18 21:01:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:19,003 INFO L495 AbstractCegarLoop]: Abstraction has 7419 states and 34533 transitions. [2022-11-18 21:01:19,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 7419 states and 34533 transitions. [2022-11-18 21:01:19,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:19,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:19,006 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:19,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:19,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:19,206 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1879394207, now seen corresponding path program 1 times [2022-11-18 21:01:19,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:19,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327346515] [2022-11-18 21:01:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:19,208 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 [2022-11-18 21:01:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:19,209 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:19,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-18 21:01:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 21:01:19,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:20,118 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 [2022-11-18 21:01:20,828 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 21:01:20,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:01:21,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:21,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327346515] [2022-11-18 21:01:21,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327346515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:21,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:21,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2022-11-18 21:01:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099564956] [2022-11-18 21:01:21,715 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:21,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 21:01:21,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 21:01:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-11-18 21:01:21,716 INFO L87 Difference]: Start difference. First operand 7419 states and 34533 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:33,463 INFO L93 Difference]: Finished difference Result 8559 states and 38146 transitions. [2022-11-18 21:01:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 21:01:33,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 21:01:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:33,500 INFO L225 Difference]: With dead ends: 8559 [2022-11-18 21:01:33,500 INFO L226 Difference]: Without dead ends: 8559 [2022-11-18 21:01:33,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 21:01:33,501 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 625 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 782 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:33,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 316 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1245 Invalid, 0 Unknown, 782 Unchecked, 8.1s Time] [2022-11-18 21:01:33,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8559 states. [2022-11-18 21:01:33,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8559 to 7766. [2022-11-18 21:01:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7766 states, 7747 states have (on average 4.5982961146250165) internal successors, (35623), 7765 states have internal predecessors, (35623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:33,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 35623 transitions. [2022-11-18 21:01:33,697 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 35623 transitions. Word has length 22 [2022-11-18 21:01:33,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:33,697 INFO L495 AbstractCegarLoop]: Abstraction has 7766 states and 35623 transitions. [2022-11-18 21:01:33,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:33,697 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 35623 transitions. [2022-11-18 21:01:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:33,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:33,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:33,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:33,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:33,900 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:33,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1879959180, now seen corresponding path program 2 times [2022-11-18 21:01:33,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:33,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131451174] [2022-11-18 21:01:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:33,901 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 [2022-11-18 21:01:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:33,902 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:33,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-18 21:01:34,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:01:34,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 21:01:34,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:34,447 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:34,447 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:34,518 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 21:01:34,518 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 16 treesize of output 18 [2022-11-18 21:01:34,535 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 [2022-11-18 21:01:34,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:34,659 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-18 21:01:34,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-11-18 21:01:34,682 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:01:34,682 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 [2022-11-18 21:01:35,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 21:01:35,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:35,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:35,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131451174] [2022-11-18 21:01:35,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131451174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:35,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064702454] [2022-11-18 21:01:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:35,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 21:01:35,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 21:01:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 21:01:35,236 INFO L87 Difference]: Start difference. First operand 7766 states and 35623 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-11-18 21:01:35,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:35,559 INFO L93 Difference]: Finished difference Result 7728 states and 35266 transitions. [2022-11-18 21:01:35,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 21:01:35,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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 22 [2022-11-18 21:01:35,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:35,592 INFO L225 Difference]: With dead ends: 7728 [2022-11-18 21:01:35,592 INFO L226 Difference]: Without dead ends: 7728 [2022-11-18 21:01:35,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 21:01:35,592 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:35,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 12 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-11-18 21:01:35,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7728 states. [2022-11-18 21:01:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7728 to 7726. [2022-11-18 21:01:35,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7726 states, 7707 states have (on average 4.574931880108992) internal successors, (35259), 7725 states have internal predecessors, (35259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7726 states to 7726 states and 35259 transitions. [2022-11-18 21:01:35,777 INFO L78 Accepts]: Start accepts. Automaton has 7726 states and 35259 transitions. Word has length 22 [2022-11-18 21:01:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:35,778 INFO L495 AbstractCegarLoop]: Abstraction has 7726 states and 35259 transitions. [2022-11-18 21:01:35,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-11-18 21:01:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7726 states and 35259 transitions. [2022-11-18 21:01:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:35,780 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:35,780 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:35,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:35,981 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1520425153, now seen corresponding path program 2 times [2022-11-18 21:01:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504616443] [2022-11-18 21:01:35,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:01:35,983 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 [2022-11-18 21:01:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:35,984 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:35,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-18 21:01:36,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:01:36,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 21:01:36,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:36,816 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:36,817 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:37,017 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-18 21:01:37,018 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-18 21:01:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:01:37,252 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 [2022-11-18 21:01:37,265 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-18 21:01:37,265 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 [2022-11-18 21:01:37,363 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-18 21:01:37,364 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 16 treesize of output 18 [2022-11-18 21:01:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:01:38,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:01:41,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:41,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504616443] [2022-11-18 21:01:41,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504616443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:41,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:41,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2022-11-18 21:01:41,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076652081] [2022-11-18 21:01:41,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:41,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 21:01:41,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 21:01:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-11-18 21:01:41,514 INFO L87 Difference]: Start difference. First operand 7726 states and 35259 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:44,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:44,017 INFO L93 Difference]: Finished difference Result 8549 states and 37867 transitions. [2022-11-18 21:01:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:01:44,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-18 21:01:44,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:44,059 INFO L225 Difference]: With dead ends: 8549 [2022-11-18 21:01:44,059 INFO L226 Difference]: Without dead ends: 8549 [2022-11-18 21:01:44,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-18 21:01:44,060 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:44,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 160 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 258 Invalid, 0 Unknown, 146 Unchecked, 2.1s Time] [2022-11-18 21:01:44,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8549 states. [2022-11-18 21:01:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8549 to 7827. [2022-11-18 21:01:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7827 states, 7808 states have (on average 4.560963114754099) internal successors, (35612), 7826 states have internal predecessors, (35612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7827 states to 7827 states and 35612 transitions. [2022-11-18 21:01:44,334 INFO L78 Accepts]: Start accepts. Automaton has 7827 states and 35612 transitions. Word has length 22 [2022-11-18 21:01:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:44,335 INFO L495 AbstractCegarLoop]: Abstraction has 7827 states and 35612 transitions. [2022-11-18 21:01:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:44,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7827 states and 35612 transitions. [2022-11-18 21:01:44,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 21:01:44,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:44,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:44,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:44,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:44,539 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:44,539 INFO L85 PathProgramCache]: Analyzing trace with hash -879271624, now seen corresponding path program 1 times [2022-11-18 21:01:44,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:44,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518615660] [2022-11-18 21:01:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:44,540 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 [2022-11-18 21:01:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:44,541 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:44,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-18 21:01:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:44,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 21:01:44,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:45,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:45,053 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:45,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518615660] [2022-11-18 21:01:45,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518615660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:45,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:45,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 21:01:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167368460] [2022-11-18 21:01:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:45,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:01:45,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:01:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:01:45,055 INFO L87 Difference]: Start difference. First operand 7827 states and 35612 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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) [2022-11-18 21:01:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:45,451 INFO L93 Difference]: Finished difference Result 7888 states and 35747 transitions. [2022-11-18 21:01:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:01:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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 22 [2022-11-18 21:01:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:45,482 INFO L225 Difference]: With dead ends: 7888 [2022-11-18 21:01:45,482 INFO L226 Difference]: Without dead ends: 7782 [2022-11-18 21:01:45,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:01:45,482 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:45,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 21:01:45,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2022-11-18 21:01:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 7750. [2022-11-18 21:01:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7750 states, 7731 states have (on average 4.581942827577286) internal successors, (35423), 7749 states have internal predecessors, (35423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7750 states to 7750 states and 35423 transitions. [2022-11-18 21:01:45,777 INFO L78 Accepts]: Start accepts. Automaton has 7750 states and 35423 transitions. Word has length 22 [2022-11-18 21:01:45,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:45,777 INFO L495 AbstractCegarLoop]: Abstraction has 7750 states and 35423 transitions. [2022-11-18 21:01:45,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 2 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) [2022-11-18 21:01:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7750 states and 35423 transitions. [2022-11-18 21:01:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 21:01:45,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:45,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:45,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:45,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:45,982 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:45,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 370132750, now seen corresponding path program 1 times [2022-11-18 21:01:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:45,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325791000] [2022-11-18 21:01:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:45,983 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 [2022-11-18 21:01:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:45,984 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:45,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-18 21:01:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:46,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-18 21:01:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:46,824 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:46,824 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:01:46,919 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 [2022-11-18 21:01:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 21:01:47,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 21:01:47,958 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:01:47,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325791000] [2022-11-18 21:01:47,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325791000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:47,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:47,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2022-11-18 21:01:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462212873] [2022-11-18 21:01:47,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:47,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 21:01:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:01:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 21:01:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-18 21:01:47,960 INFO L87 Difference]: Start difference. First operand 7750 states and 35423 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:58,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 21:01:58,048 INFO L93 Difference]: Finished difference Result 8886 states and 39342 transitions. [2022-11-18 21:01:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 21:01:58,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 21:01:58,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 21:01:58,078 INFO L225 Difference]: With dead ends: 8886 [2022-11-18 21:01:58,078 INFO L226 Difference]: Without dead ends: 8886 [2022-11-18 21:01:58,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=576, Invalid=2076, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 21:01:58,079 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 468 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1851 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-18 21:01:58,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 256 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1851 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-18 21:01:58,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2022-11-18 21:01:58,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 7288. [2022-11-18 21:01:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7288 states, 7269 states have (on average 4.591140459485486) internal successors, (33373), 7287 states have internal predecessors, (33373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7288 states to 7288 states and 33373 transitions. [2022-11-18 21:01:58,277 INFO L78 Accepts]: Start accepts. Automaton has 7288 states and 33373 transitions. Word has length 23 [2022-11-18 21:01:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 21:01:58,277 INFO L495 AbstractCegarLoop]: Abstraction has 7288 states and 33373 transitions. [2022-11-18 21:01:58,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 7288 states and 33373 transitions. [2022-11-18 21:01:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 21:01:58,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 21:01:58,279 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-18 21:01:58,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:58,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 21:01:58,480 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2022-11-18 21:01:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:58,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2122533417, now seen corresponding path program 4 times [2022-11-18 21:01:58,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 21:01:58,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1606956563] [2022-11-18 21:01:58,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 21:01:58,481 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 [2022-11-18 21:01:58,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 21:01:58,482 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -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) [2022-11-18 21:01:58,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1aab053-c12b-47bf-91cd-f7c2f2f7d2ac/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-18 21:01:58,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 21:01:58,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:01:58,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-18 21:01:58,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:59,044 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-18 21:01:59,044 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-18 21:02:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:00,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:17,257 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 21:02:17,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1606956563] [2022-11-18 21:02:17,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1606956563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:17,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:02:17,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 46 [2022-11-18 21:02:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163220514] [2022-11-18 21:02:17,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:17,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-18 21:02:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 21:02:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-18 21:02:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 21:02:17,259 INFO L87 Difference]: Start difference. First operand 7288 states and 33373 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:53,961 WARN L233 SmtUtils]: Spent 23.75s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)