./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.0.i --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_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/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_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.0.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/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_cee77825-cf64-4dda-8322-7cc8ba8bc68b/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 ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea --- 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 20:34:21,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:34:21,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:34:21,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:34:21,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:34:21,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:34:21,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:34:21,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:34:21,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:34:21,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:34:21,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:34:21,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:34:21,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:34:21,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:34:21,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:34:21,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:34:21,777 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:34:21,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:34:21,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:34:21,790 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:34:21,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:34:21,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:34:21,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:34:21,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:34:21,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:34:21,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:34:21,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:34:21,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:34:21,813 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:34:21,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:34:21,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:34:21,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:34:21,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:34:21,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:34:21,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:34:21,824 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:34:21,825 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:34:21,825 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:34:21,825 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:34:21,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:34:21,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:34:21,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:34:21,870 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:34:21,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:34:21,871 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:34:21,872 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:34:21,873 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:34:21,873 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:34:21,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:34:21,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:34:21,874 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:34:21,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:34:21,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:34:21,876 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:34:21,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:34:21,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:34:21,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:34:21,877 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:34:21,878 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:34:21,878 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:34:21,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:34:21,878 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:34:21,878 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:34:21,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:34:21,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:34:21,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:34:21,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:34:21,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:34:21,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:34:21,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:34:21,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:34:21,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:34:21,883 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_cee77825-cf64-4dda-8322-7cc8ba8bc68b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce7b97696e85da66033a1f3711f1d24681434c76600ae3cd891d7ea07b7fcbea [2022-11-18 20:34:22,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:34:22,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:34:22,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:34:22,274 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:34:22,275 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:34:22,277 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-11-18 20:34:22,367 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/data/3faaa8c48/9eb2ceeab2064d96bd3a04253badc9b3/FLAG4c9df20aa [2022-11-18 20:34:23,026 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:34:23,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/sv-benchmarks/c/memsafety/lockfree-3.0.i [2022-11-18 20:34:23,043 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/data/3faaa8c48/9eb2ceeab2064d96bd3a04253badc9b3/FLAG4c9df20aa [2022-11-18 20:34:23,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/data/3faaa8c48/9eb2ceeab2064d96bd3a04253badc9b3 [2022-11-18 20:34:23,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:34:23,300 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:34:23,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:34:23,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:34:23,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:34:23,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ab33bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23, skipping insertion in model container [2022-11-18 20:34:23,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:34:23,379 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:34:23,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:34:23,781 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:34:23,862 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:34:23,907 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:34:23,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23 WrapperNode [2022-11-18 20:34:23,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:34:23,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:34:23,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:34:23,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:34:23,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,952 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,979 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2022-11-18 20:34:23,979 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:34:23,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:34:23,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:34:23,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:34:23,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:23,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,023 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:34:24,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:34:24,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:34:24,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:34:24,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (1/1) ... [2022-11-18 20:34:24,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:34:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:24,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:34:24,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:34:24,142 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:34:24,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:34:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:34:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:34:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:34:24,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:34:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:34:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:34:24,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:34:24,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:34:24,306 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:34:24,308 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:34:24,742 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:34:24,749 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:34:24,751 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:34:24,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:24 BoogieIcfgContainer [2022-11-18 20:34:24,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:34:24,758 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:34:24,758 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:34:24,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:34:24,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:34:23" (1/3) ... [2022-11-18 20:34:24,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128a18bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:24, skipping insertion in model container [2022-11-18 20:34:24,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:23" (2/3) ... [2022-11-18 20:34:24,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@128a18bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:34:24, skipping insertion in model container [2022-11-18 20:34:24,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:24" (3/3) ... [2022-11-18 20:34:24,766 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.0.i [2022-11-18 20:34:24,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:34:24,792 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-18 20:34:24,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:34:24,888 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;@2051461d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:34:24,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-18 20:34:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:34:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:34:24,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:24,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-18 20:34:24,907 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash 28819106, now seen corresponding path program 1 times [2022-11-18 20:34:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:24,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633946862] [2022-11-18 20:34:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:25,144 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 20:34:25,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:25,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633946862] [2022-11-18 20:34:25,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633946862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:25,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:25,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:25,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668001141] [2022-11-18 20:34:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:25,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:34:25,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:34:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:34:25,205 INFO L87 Difference]: Start difference. First operand has 64 states, 43 states have (on average 1.930232558139535) internal successors, (83), 63 states have internal predecessors, (83), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:25,237 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2022-11-18 20:34:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:34:25,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-18 20:34:25,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:25,260 INFO L225 Difference]: With dead ends: 64 [2022-11-18 20:34:25,260 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 20:34:25,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:34:25,265 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:25,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 20:34:25,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-18 20:34:25,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.880952380952381) internal successors, (79), 61 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 20:34:25,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-11-18 20:34:25,330 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 5 [2022-11-18 20:34:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:25,331 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-11-18 20:34:25,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-11-18 20:34:25,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:34:25,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:25,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:25,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:34:25,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1806851052, now seen corresponding path program 1 times [2022-11-18 20:34:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886473576] [2022-11-18 20:34:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:25,444 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 20:34:25,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:25,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886473576] [2022-11-18 20:34:25,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886473576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:25,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:25,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:34:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244330629] [2022-11-18 20:34:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:25,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:25,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:25,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:25,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:25,461 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 3 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 20:34:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:25,487 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2022-11-18 20:34:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 20:34:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:25,489 INFO L225 Difference]: With dead ends: 63 [2022-11-18 20:34:25,489 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:34:25,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 20:34:25,491 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 0 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:25,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:34:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-11-18 20:34:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.8604651162790697) internal successors, (80), 62 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-11-18 20:34:25,500 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 7 [2022-11-18 20:34:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:25,501 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-11-18 20:34:25,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 20:34:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-11-18 20:34:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:34:25,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:25,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:25,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:34:25,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:25,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1806910634, now seen corresponding path program 1 times [2022-11-18 20:34:25,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:25,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646179537] [2022-11-18 20:34:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:25,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:25,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646179537] [2022-11-18 20:34:25,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646179537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:25,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:25,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:25,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920449438] [2022-11-18 20:34:25,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:25,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:25,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:25,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:25,620 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 20:34:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:25,664 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-11-18 20:34:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:25,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 20:34:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:25,666 INFO L225 Difference]: With dead ends: 111 [2022-11-18 20:34:25,666 INFO L226 Difference]: Without dead ends: 111 [2022-11-18 20:34:25,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:25,668 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 62 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 138 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-18 20:34:25,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 93. [2022-11-18 20:34:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.8767123287671232) internal successors, (137), 92 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 20:34:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 137 transitions. [2022-11-18 20:34:25,680 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 137 transitions. Word has length 7 [2022-11-18 20:34:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:25,681 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 137 transitions. [2022-11-18 20:34:25,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 20:34:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 137 transitions. [2022-11-18 20:34:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:25,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:25,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:25,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:34:25,683 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:25,683 INFO L85 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2022-11-18 20:34:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:25,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883886556] [2022-11-18 20:34:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:25,822 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 20:34:25,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:25,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883886556] [2022-11-18 20:34:25,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883886556] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:25,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:25,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:34:25,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973587435] [2022-11-18 20:34:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:25,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:25,825 INFO L87 Difference]: Start difference. First operand 93 states and 137 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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 20:34:25,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:25,897 INFO L93 Difference]: Finished difference Result 101 states and 146 transitions. [2022-11-18 20:34:25,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:34:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 20:34:25,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:25,899 INFO L225 Difference]: With dead ends: 101 [2022-11-18 20:34:25,899 INFO L226 Difference]: Without dead ends: 101 [2022-11-18 20:34:25,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:34:25,901 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 7 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:25,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 211 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-18 20:34:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2022-11-18 20:34:25,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 94 states have internal predecessors, (139), 0 states have call successors, (0), 0 states 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 20:34:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 139 transitions. [2022-11-18 20:34:25,913 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 139 transitions. Word has length 8 [2022-11-18 20:34:25,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:25,913 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 139 transitions. [2022-11-18 20:34:25,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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 20:34:25,914 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 139 transitions. [2022-11-18 20:34:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:25,914 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:25,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:25,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:34:25,915 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:25,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:25,920 INFO L85 PathProgramCache]: Analyzing trace with hash 179653412, now seen corresponding path program 1 times [2022-11-18 20:34:25,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:25,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764558207] [2022-11-18 20:34:25,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:25,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,019 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 20:34:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764558207] [2022-11-18 20:34:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764558207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:26,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:26,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626490873] [2022-11-18 20:34:26,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:26,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:26,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,022 INFO L87 Difference]: Start difference. First operand 95 states and 139 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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 20:34:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:26,126 INFO L93 Difference]: Finished difference Result 177 states and 261 transitions. [2022-11-18 20:34:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:26,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:26,129 INFO L225 Difference]: With dead ends: 177 [2022-11-18 20:34:26,129 INFO L226 Difference]: Without dead ends: 174 [2022-11-18 20:34:26,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,131 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 63 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:26,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-18 20:34:26,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 153. [2022-11-18 20:34:26,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 133 states have (on average 1.849624060150376) internal successors, (246), 152 states have internal predecessors, (246), 0 states have call successors, (0), 0 states 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 20:34:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 246 transitions. [2022-11-18 20:34:26,155 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 246 transitions. Word has length 8 [2022-11-18 20:34:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:26,156 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 246 transitions. [2022-11-18 20:34:26,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,163 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 246 transitions. [2022-11-18 20:34:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:26,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:26,165 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:26,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:34:26,165 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:26,166 INFO L85 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2022-11-18 20:34:26,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:26,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324562744] [2022-11-18 20:34:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:26,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:26,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:26,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324562744] [2022-11-18 20:34:26,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324562744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:26,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:26,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:26,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065595245] [2022-11-18 20:34:26,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,248 INFO L87 Difference]: Start difference. First operand 153 states and 246 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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 20:34:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:26,333 INFO L93 Difference]: Finished difference Result 231 states and 355 transitions. [2022-11-18 20:34:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:26,336 INFO L225 Difference]: With dead ends: 231 [2022-11-18 20:34:26,336 INFO L226 Difference]: Without dead ends: 231 [2022-11-18 20:34:26,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,338 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 69 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:26,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-18 20:34:26,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 208. [2022-11-18 20:34:26,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 190 states have (on average 1.7894736842105263) internal successors, (340), 207 states have internal predecessors, (340), 0 states have call successors, (0), 0 states 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 20:34:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 340 transitions. [2022-11-18 20:34:26,355 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 340 transitions. Word has length 8 [2022-11-18 20:34:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:26,355 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 340 transitions. [2022-11-18 20:34:26,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 340 transitions. [2022-11-18 20:34:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:34:26,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:26,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:34:26,357 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2022-11-18 20:34:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435272183] [2022-11-18 20:34:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:26,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,578 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 20:34:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435272183] [2022-11-18 20:34:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435272183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:26,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:26,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:34:26,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353886902] [2022-11-18 20:34:26,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:26,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:26,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:26,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,582 INFO L87 Difference]: Start difference. First operand 208 states and 340 transitions. Second operand has 3 states, 2 states have (on average 4.0) 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 20:34:26,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:26,700 INFO L93 Difference]: Finished difference Result 226 states and 346 transitions. [2022-11-18 20:34:26,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:26,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:26,703 INFO L225 Difference]: With dead ends: 226 [2022-11-18 20:34:26,703 INFO L226 Difference]: Without dead ends: 226 [2022-11-18 20:34:26,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:34:26,710 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:26,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 180 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-18 20:34:26,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 206. [2022-11-18 20:34:26,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 190 states have (on average 1.7473684210526317) internal successors, (332), 205 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 20:34:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 332 transitions. [2022-11-18 20:34:26,727 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 332 transitions. Word has length 8 [2022-11-18 20:34:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:26,727 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 332 transitions. [2022-11-18 20:34:26,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) 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 20:34:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 332 transitions. [2022-11-18 20:34:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:34:26,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:26,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:26,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:34:26,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:26,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2022-11-18 20:34:26,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:26,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705835442] [2022-11-18 20:34:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:26,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,792 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 20:34:26,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:26,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705835442] [2022-11-18 20:34:26,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705835442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:26,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:26,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:34:26,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982119946] [2022-11-18 20:34:26,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:26,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:26,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:26,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:26,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:26,796 INFO L87 Difference]: Start difference. First operand 206 states and 332 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:34:26,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:26,868 INFO L93 Difference]: Finished difference Result 265 states and 366 transitions. [2022-11-18 20:34:26,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:34:26,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:34:26,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:26,870 INFO L225 Difference]: With dead ends: 265 [2022-11-18 20:34:26,871 INFO L226 Difference]: Without dead ends: 265 [2022-11-18 20:34:26,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:34:26,878 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 105 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:26,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 279 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:26,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-11-18 20:34:26,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2022-11-18 20:34:26,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 151 states have (on average 1.6821192052980132) internal successors, (254), 162 states have internal predecessors, (254), 0 states have call successors, (0), 0 states 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 20:34:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 254 transitions. [2022-11-18 20:34:26,900 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 254 transitions. Word has length 9 [2022-11-18 20:34:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:26,900 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 254 transitions. [2022-11-18 20:34:26,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 20:34:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 254 transitions. [2022-11-18 20:34:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:34:26,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:26,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:26,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:34:26,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 845049582, now seen corresponding path program 1 times [2022-11-18 20:34:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093315617] [2022-11-18 20:34:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:26,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:26,987 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 20:34:26,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093315617] [2022-11-18 20:34:26,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093315617] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:26,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:26,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:34:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134073964] [2022-11-18 20:34:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:26,990 INFO L87 Difference]: Start difference. First operand 163 states and 254 transitions. Second operand has 4 states, 4 states have (on average 2.5) 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 20:34:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:27,036 INFO L93 Difference]: Finished difference Result 362 states and 528 transitions. [2022-11-18 20:34:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:34:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) 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 20:34:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:27,038 INFO L225 Difference]: With dead ends: 362 [2022-11-18 20:34:27,039 INFO L226 Difference]: Without dead ends: 362 [2022-11-18 20:34:27,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:34:27,040 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 107 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:27,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 232 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-11-18 20:34:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 234. [2022-11-18 20:34:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 222 states have (on average 1.6036036036036037) internal successors, (356), 233 states have internal predecessors, (356), 0 states have call successors, (0), 0 states 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 20:34:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 356 transitions. [2022-11-18 20:34:27,069 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 356 transitions. Word has length 10 [2022-11-18 20:34:27,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:27,069 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 356 transitions. [2022-11-18 20:34:27,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) 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 20:34:27,070 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 356 transitions. [2022-11-18 20:34:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:34:27,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:27,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:27,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:34:27,071 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:27,077 INFO L85 PathProgramCache]: Analyzing trace with hash 22246394, now seen corresponding path program 1 times [2022-11-18 20:34:27,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:27,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421965387] [2022-11-18 20:34:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:27,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:27,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:27,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:27,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421965387] [2022-11-18 20:34:27,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421965387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691100892] [2022-11-18 20:34:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:27,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:27,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:27,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:27,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:34:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:34:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:27,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:27,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691100892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:27,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:27,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-11-18 20:34:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372612924] [2022-11-18 20:34:27,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:34:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:27,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:34:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:34:27,522 INFO L87 Difference]: Start difference. First operand 234 states and 356 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 20:34:27,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:27,575 INFO L93 Difference]: Finished difference Result 238 states and 346 transitions. [2022-11-18 20:34:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:34:27,576 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 16 [2022-11-18 20:34:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:27,578 INFO L225 Difference]: With dead ends: 238 [2022-11-18 20:34:27,578 INFO L226 Difference]: Without dead ends: 238 [2022-11-18 20:34:27,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:34:27,580 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 143 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:27,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 338 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:27,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-11-18 20:34:27,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 230. [2022-11-18 20:34:27,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 218 states have (on average 1.5779816513761469) internal successors, (344), 229 states have internal predecessors, (344), 0 states have call successors, (0), 0 states 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 20:34:27,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 344 transitions. [2022-11-18 20:34:27,592 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 344 transitions. Word has length 16 [2022-11-18 20:34:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:27,593 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 344 transitions. [2022-11-18 20:34:27,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 20:34:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 344 transitions. [2022-11-18 20:34:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:34:27,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:27,595 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:27,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:27,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:34:27,802 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 617603772, now seen corresponding path program 1 times [2022-11-18 20:34:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186661512] [2022-11-18 20:34:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:27,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:27,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186661512] [2022-11-18 20:34:27,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186661512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686257300] [2022-11-18 20:34:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:27,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:27,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:27,897 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:27,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:34:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:27,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:34:27,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:28,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:28,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686257300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:28,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:28,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-18 20:34:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47224572] [2022-11-18 20:34:28,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:28,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:34:28,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:28,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:34:28,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:34:28,132 INFO L87 Difference]: Start difference. First operand 230 states and 344 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:34:28,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:28,246 INFO L93 Difference]: Finished difference Result 525 states and 738 transitions. [2022-11-18 20:34:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:34:28,247 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 16 [2022-11-18 20:34:28,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:28,249 INFO L225 Difference]: With dead ends: 525 [2022-11-18 20:34:28,250 INFO L226 Difference]: Without dead ends: 525 [2022-11-18 20:34:28,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:28,251 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 209 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:28,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 528 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:28,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-18 20:34:28,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-11-18 20:34:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.5305466237942122) internal successors, (476), 322 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 20:34:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 476 transitions. [2022-11-18 20:34:28,262 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 476 transitions. Word has length 16 [2022-11-18 20:34:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:28,263 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 476 transitions. [2022-11-18 20:34:28,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 20:34:28,264 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 476 transitions. [2022-11-18 20:34:28,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:34:28,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:28,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:28,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:28,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:28,477 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:28,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:28,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1134377974, now seen corresponding path program 2 times [2022-11-18 20:34:28,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:28,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790930215] [2022-11-18 20:34:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:28,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:34:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790930215] [2022-11-18 20:34:28,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790930215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602623355] [2022-11-18 20:34:28,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:34:28,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:28,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:28,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:28,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:34:28,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:34:28,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:34:28,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:34:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:28,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:28,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:28,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602623355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:28,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:28,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-11-18 20:34:28,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684493155] [2022-11-18 20:34:28,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:28,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:34:28,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:28,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:34:28,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:34:28,817 INFO L87 Difference]: Start difference. First operand 323 states and 476 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 20:34:28,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:28,993 INFO L93 Difference]: Finished difference Result 525 states and 726 transitions. [2022-11-18 20:34:28,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:34:28,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 22 [2022-11-18 20:34:28,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:28,997 INFO L225 Difference]: With dead ends: 525 [2022-11-18 20:34:28,997 INFO L226 Difference]: Without dead ends: 525 [2022-11-18 20:34:28,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:34:28,998 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 405 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:28,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 420 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2022-11-18 20:34:29,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 323. [2022-11-18 20:34:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 311 states have (on average 1.4919614147909968) internal successors, (464), 322 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 20:34:29,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 464 transitions. [2022-11-18 20:34:29,009 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 464 transitions. Word has length 22 [2022-11-18 20:34:29,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:29,010 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 464 transitions. [2022-11-18 20:34:29,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 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 20:34:29,011 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 464 transitions. [2022-11-18 20:34:29,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:34:29,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:29,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:29,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:29,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:29,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:29,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:29,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1692627395, now seen corresponding path program 1 times [2022-11-18 20:34:29,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:29,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356023790] [2022-11-18 20:34:29,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:29,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:29,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:29,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356023790] [2022-11-18 20:34:29,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356023790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:29,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518500320] [2022-11-18 20:34:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:29,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:29,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:29,308 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:29,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:34:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:29,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:34:29,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:29,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518500320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:29,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:29,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-18 20:34:29,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845176363] [2022-11-18 20:34:29,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:29,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:34:29,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:29,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:34:29,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:34:29,558 INFO L87 Difference]: Start difference. First operand 323 states and 464 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 20:34:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:29,659 INFO L93 Difference]: Finished difference Result 936 states and 1334 transitions. [2022-11-18 20:34:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:34:29,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-11-18 20:34:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:29,663 INFO L225 Difference]: With dead ends: 936 [2022-11-18 20:34:29,664 INFO L226 Difference]: Without dead ends: 936 [2022-11-18 20:34:29,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 20:34:29,665 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 180 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:29,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 167 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-11-18 20:34:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 811. [2022-11-18 20:34:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 799 states have (on average 1.4793491864831039) internal successors, (1182), 810 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1182 transitions. [2022-11-18 20:34:29,685 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1182 transitions. Word has length 24 [2022-11-18 20:34:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:29,685 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 1182 transitions. [2022-11-18 20:34:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 20:34:29,686 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1182 transitions. [2022-11-18 20:34:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:34:29,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:29,687 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:29,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:29,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:34:29,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:29,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash -6965384, now seen corresponding path program 1 times [2022-11-18 20:34:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:29,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709711871] [2022-11-18 20:34:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:29,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:30,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:30,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709711871] [2022-11-18 20:34:30,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709711871] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:30,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288690092] [2022-11-18 20:34:30,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:30,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:30,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:30,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:30,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:34:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:34:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:30,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:30,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288690092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:30,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:30,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-18 20:34:30,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928959968] [2022-11-18 20:34:30,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:30,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:34:30,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:34:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:34:30,267 INFO L87 Difference]: Start difference. First operand 811 states and 1182 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:30,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:30,469 INFO L93 Difference]: Finished difference Result 2807 states and 3858 transitions. [2022-11-18 20:34:30,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:34:30,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 20:34:30,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:30,479 INFO L225 Difference]: With dead ends: 2807 [2022-11-18 20:34:30,480 INFO L226 Difference]: Without dead ends: 2807 [2022-11-18 20:34:30,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:34:30,481 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 566 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 566 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:30,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [566 Valid, 583 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2807 states. [2022-11-18 20:34:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2807 to 1879. [2022-11-18 20:34:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1867 states have (on average 1.432244242099625) internal successors, (2674), 1878 states have internal predecessors, (2674), 0 states have call successors, (0), 0 states 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 20:34:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 2674 transitions. [2022-11-18 20:34:30,530 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 2674 transitions. Word has length 27 [2022-11-18 20:34:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:30,530 INFO L495 AbstractCegarLoop]: Abstraction has 1879 states and 2674 transitions. [2022-11-18 20:34:30,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 2674 transitions. [2022-11-18 20:34:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:34:30,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:30,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:30,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:30,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:34:30,737 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:30,738 INFO L85 PathProgramCache]: Analyzing trace with hash 554127938, now seen corresponding path program 1 times [2022-11-18 20:34:30,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:30,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409518120] [2022-11-18 20:34:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:30,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:34:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:30,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409518120] [2022-11-18 20:34:30,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409518120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:30,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788413828] [2022-11-18 20:34:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:30,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:30,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:30,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:30,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:34:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:30,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:34:30,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:31,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:34:31,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:34:31,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788413828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:31,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:31,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-18 20:34:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990372809] [2022-11-18 20:34:31,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:31,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:34:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:34:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:34:31,092 INFO L87 Difference]: Start difference. First operand 1879 states and 2674 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:31,212 INFO L93 Difference]: Finished difference Result 1558 states and 2125 transitions. [2022-11-18 20:34:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:34:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-18 20:34:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:31,218 INFO L225 Difference]: With dead ends: 1558 [2022-11-18 20:34:31,218 INFO L226 Difference]: Without dead ends: 1558 [2022-11-18 20:34:31,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:34:31,219 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 376 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:31,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 520 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-11-18 20:34:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 885. [2022-11-18 20:34:31,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 873 states have (on average 1.404352806414662) internal successors, (1226), 884 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states 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 20:34:31,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1226 transitions. [2022-11-18 20:34:31,262 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1226 transitions. Word has length 27 [2022-11-18 20:34:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:31,275 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1226 transitions. [2022-11-18 20:34:31,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1226 transitions. [2022-11-18 20:34:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 20:34:31,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:31,277 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:31,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:31,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:34:31,484 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:31,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:31,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2001409998, now seen corresponding path program 1 times [2022-11-18 20:34:31,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:31,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581051785] [2022-11-18 20:34:31,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:31,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:31,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-18 20:34:31,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581051785] [2022-11-18 20:34:31,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581051785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:31,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410373279] [2022-11-18 20:34:31,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:31,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:31,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:31,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:31,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:34:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:34:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:31,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:34:32,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410373279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:32,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:32,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 13 [2022-11-18 20:34:32,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305156998] [2022-11-18 20:34:32,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:34:32,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:34:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:34:32,129 INFO L87 Difference]: Start difference. First operand 885 states and 1226 transitions. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:32,582 INFO L93 Difference]: Finished difference Result 2448 states and 3223 transitions. [2022-11-18 20:34:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:34:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-18 20:34:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:32,592 INFO L225 Difference]: With dead ends: 2448 [2022-11-18 20:34:32,592 INFO L226 Difference]: Without dead ends: 2448 [2022-11-18 20:34:32,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:34:32,593 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1433 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1433 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:32,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1433 Valid, 811 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:32,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-11-18 20:34:32,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 984. [2022-11-18 20:34:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 972 states have (on average 1.4207818930041152) internal successors, (1381), 983 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states 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 20:34:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1381 transitions. [2022-11-18 20:34:32,627 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1381 transitions. Word has length 51 [2022-11-18 20:34:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:32,628 INFO L495 AbstractCegarLoop]: Abstraction has 984 states and 1381 transitions. [2022-11-18 20:34:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1381 transitions. [2022-11-18 20:34:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:34:32,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:32,630 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:32,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:34:32,838 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1426339750, now seen corresponding path program 1 times [2022-11-18 20:34:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:32,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26847412] [2022-11-18 20:34:32,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:32,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 65 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:34:33,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:33,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26847412] [2022-11-18 20:34:33,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26847412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:33,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778902025] [2022-11-18 20:34:33,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:33,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:33,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:33,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:33,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:34:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:34:33,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 20:34:33,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-18 20:34:33,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778902025] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:33,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:34:33,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2022-11-18 20:34:33,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532384893] [2022-11-18 20:34:33,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:33,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:34:33,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:33,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:34:33,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:34:33,410 INFO L87 Difference]: Start difference. First operand 984 states and 1381 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:34:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:33,551 INFO L93 Difference]: Finished difference Result 2310 states and 3137 transitions. [2022-11-18 20:34:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:34:33,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 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 59 [2022-11-18 20:34:33,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:33,559 INFO L225 Difference]: With dead ends: 2310 [2022-11-18 20:34:33,560 INFO L226 Difference]: Without dead ends: 2310 [2022-11-18 20:34:33,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:34:33,561 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 273 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:33,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 388 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:33,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-11-18 20:34:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1632. [2022-11-18 20:34:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1620 states have (on average 1.3962962962962964) internal successors, (2262), 1631 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states 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 20:34:33,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 2262 transitions. [2022-11-18 20:34:33,600 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 2262 transitions. Word has length 59 [2022-11-18 20:34:33,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:33,601 INFO L495 AbstractCegarLoop]: Abstraction has 1632 states and 2262 transitions. [2022-11-18 20:34:33,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:34:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 2262 transitions. [2022-11-18 20:34:33,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-18 20:34:33,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:33,603 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:33,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:33,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:34:33,810 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:33,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -443713253, now seen corresponding path program 1 times [2022-11-18 20:34:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:33,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674092702] [2022-11-18 20:34:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 20:34:33,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674092702] [2022-11-18 20:34:33,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674092702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:33,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640984786] [2022-11-18 20:34:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:33,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:33,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:33,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:34,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:34:34,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:34:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:34:34,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:34:34,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640984786] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:34,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:34,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 12 [2022-11-18 20:34:34,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724923458] [2022-11-18 20:34:34,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:34,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:34:34,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:34,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:34:34,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:34:34,297 INFO L87 Difference]: Start difference. First operand 1632 states and 2262 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:34:35,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:35,895 INFO L93 Difference]: Finished difference Result 9168 states and 12495 transitions. [2022-11-18 20:34:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 20:34:35,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 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 59 [2022-11-18 20:34:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:35,927 INFO L225 Difference]: With dead ends: 9168 [2022-11-18 20:34:35,928 INFO L226 Difference]: Without dead ends: 9168 [2022-11-18 20:34:35,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=2021, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:34:35,930 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1543 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:35,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 717 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:34:35,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9168 states. [2022-11-18 20:34:36,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9168 to 4625. [2022-11-18 20:34:36,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4614 states have (on average 1.4195925444299957) internal successors, (6550), 4624 states have internal predecessors, (6550), 0 states have call successors, (0), 0 states 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 20:34:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 6550 transitions. [2022-11-18 20:34:36,076 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 6550 transitions. Word has length 59 [2022-11-18 20:34:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:36,076 INFO L495 AbstractCegarLoop]: Abstraction has 4625 states and 6550 transitions. [2022-11-18 20:34:36,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:34:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 6550 transitions. [2022-11-18 20:34:36,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:34:36,079 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:36,079 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:36,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:36,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:34:36,291 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:36,292 INFO L85 PathProgramCache]: Analyzing trace with hash -791217300, now seen corresponding path program 1 times [2022-11-18 20:34:36,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:36,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34458344] [2022-11-18 20:34:36,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 68 proven. 4 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:34:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34458344] [2022-11-18 20:34:36,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34458344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596921691] [2022-11-18 20:34:36,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:36,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:36,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:36,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:36,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:34:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:36,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:34:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 101 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:34:36,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 103 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:34:36,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596921691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:36,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:36,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2022-11-18 20:34:36,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104368757] [2022-11-18 20:34:36,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:34:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:34:36,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:34:36,895 INFO L87 Difference]: Start difference. First operand 4625 states and 6550 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:34:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:37,653 INFO L93 Difference]: Finished difference Result 10247 states and 14121 transitions. [2022-11-18 20:34:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:34:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 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 63 [2022-11-18 20:34:37,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:37,687 INFO L225 Difference]: With dead ends: 10247 [2022-11-18 20:34:37,688 INFO L226 Difference]: Without dead ends: 10247 [2022-11-18 20:34:37,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:34:37,689 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1141 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 1379 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:37,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1141 Valid, 1379 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2022-11-18 20:34:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 4425. [2022-11-18 20:34:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4425 states, 4414 states have (on average 1.3948799275033983) internal successors, (6157), 4424 states have internal predecessors, (6157), 0 states have call successors, (0), 0 states 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 20:34:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4425 states to 4425 states and 6157 transitions. [2022-11-18 20:34:37,846 INFO L78 Accepts]: Start accepts. Automaton has 4425 states and 6157 transitions. Word has length 63 [2022-11-18 20:34:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:37,847 INFO L495 AbstractCegarLoop]: Abstraction has 4425 states and 6157 transitions. [2022-11-18 20:34:37,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 20:34:37,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4425 states and 6157 transitions. [2022-11-18 20:34:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:34:37,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:37,850 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:37,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:38,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:38,056 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash 767429099, now seen corresponding path program 1 times [2022-11-18 20:34:38,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:38,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337544435] [2022-11-18 20:34:38,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:38,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 72 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 20:34:38,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337544435] [2022-11-18 20:34:38,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337544435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326522442] [2022-11-18 20:34:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:38,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:38,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:38,267 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:38,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:34:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:38,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:34:38,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:34:38,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 52 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:34:38,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326522442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:38,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:38,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-18 20:34:38,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755645407] [2022-11-18 20:34:38,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:38,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:34:38,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:38,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:34:38,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:34:38,573 INFO L87 Difference]: Start difference. First operand 4425 states and 6157 transitions. Second operand has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 20:34:38,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:38,922 INFO L93 Difference]: Finished difference Result 3827 states and 5012 transitions. [2022-11-18 20:34:38,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:34:38,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 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 63 [2022-11-18 20:34:38,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:38,931 INFO L225 Difference]: With dead ends: 3827 [2022-11-18 20:34:38,931 INFO L226 Difference]: Without dead ends: 3827 [2022-11-18 20:34:38,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:34:38,932 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 627 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:38,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 2060 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2022-11-18 20:34:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 2865. [2022-11-18 20:34:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2854 states have (on average 1.3135949544498948) internal successors, (3749), 2864 states have internal predecessors, (3749), 0 states have call successors, (0), 0 states 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 20:34:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3749 transitions. [2022-11-18 20:34:39,030 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3749 transitions. Word has length 63 [2022-11-18 20:34:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:39,031 INFO L495 AbstractCegarLoop]: Abstraction has 2865 states and 3749 transitions. [2022-11-18 20:34:39,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.428571428571429) internal successors, (90), 14 states have internal predecessors, (90), 0 states have call successors, (0), 0 states 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 20:34:39,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3749 transitions. [2022-11-18 20:34:39,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:34:39,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:39,033 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:39,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:39,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:39,240 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 965172541, now seen corresponding path program 1 times [2022-11-18 20:34:39,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:39,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203926567] [2022-11-18 20:34:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:39,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:39,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:34:39,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:39,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203926567] [2022-11-18 20:34:39,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203926567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:39,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230738805] [2022-11-18 20:34:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:39,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:39,359 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:39,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:34:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:39,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:34:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:39,568 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:34:39,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:39,653 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-18 20:34:39,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230738805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:39,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:39,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-18 20:34:39,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032528249] [2022-11-18 20:34:39,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:39,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:34:39,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:39,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:34:39,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:34:39,656 INFO L87 Difference]: Start difference. First operand 2865 states and 3749 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 20:34:39,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:39,742 INFO L93 Difference]: Finished difference Result 2863 states and 3720 transitions. [2022-11-18 20:34:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:34:39,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 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 64 [2022-11-18 20:34:39,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:39,748 INFO L225 Difference]: With dead ends: 2863 [2022-11-18 20:34:39,749 INFO L226 Difference]: Without dead ends: 2863 [2022-11-18 20:34:39,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:34:39,750 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 110 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:39,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 256 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2863 states. [2022-11-18 20:34:39,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2863 to 2854. [2022-11-18 20:34:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2854 states, 2843 states have (on average 1.307069996482589) internal successors, (3716), 2853 states have internal predecessors, (3716), 0 states have call successors, (0), 0 states 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 20:34:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2854 states to 2854 states and 3716 transitions. [2022-11-18 20:34:39,803 INFO L78 Accepts]: Start accepts. Automaton has 2854 states and 3716 transitions. Word has length 64 [2022-11-18 20:34:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:39,804 INFO L495 AbstractCegarLoop]: Abstraction has 2854 states and 3716 transitions. [2022-11-18 20:34:39,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states 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 20:34:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2854 states and 3716 transitions. [2022-11-18 20:34:39,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 20:34:39,805 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:39,805 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:39,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:40,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:34:40,020 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1737502264, now seen corresponding path program 1 times [2022-11-18 20:34:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:40,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860589945] [2022-11-18 20:34:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 89 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:34:40,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:40,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860589945] [2022-11-18 20:34:40,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860589945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:40,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178778042] [2022-11-18 20:34:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:40,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:40,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:40,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:40,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:34:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:40,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:34:40,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 95 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:34:40,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:40,717 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:34:40,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178778042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:40,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:40,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 11 [2022-11-18 20:34:40,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816539946] [2022-11-18 20:34:40,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:40,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:34:40,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:40,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:34:40,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:40,720 INFO L87 Difference]: Start difference. First operand 2854 states and 3716 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:41,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:41,108 INFO L93 Difference]: Finished difference Result 3939 states and 5165 transitions. [2022-11-18 20:34:41,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:34:41,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-11-18 20:34:41,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:41,117 INFO L225 Difference]: With dead ends: 3939 [2022-11-18 20:34:41,117 INFO L226 Difference]: Without dead ends: 3939 [2022-11-18 20:34:41,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:34:41,120 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 369 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:41,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 778 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:41,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2022-11-18 20:34:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 2136. [2022-11-18 20:34:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2125 states have (on average 1.3035294117647058) internal successors, (2770), 2135 states have internal predecessors, (2770), 0 states have call successors, (0), 0 states 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 20:34:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 2770 transitions. [2022-11-18 20:34:41,172 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 2770 transitions. Word has length 65 [2022-11-18 20:34:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:41,172 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 2770 transitions. [2022-11-18 20:34:41,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 2770 transitions. [2022-11-18 20:34:41,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:34:41,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:41,176 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:41,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:41,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:34:41,383 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1937207539, now seen corresponding path program 1 times [2022-11-18 20:34:41,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:41,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109080943] [2022-11-18 20:34:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:41,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 20:34:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:41,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109080943] [2022-11-18 20:34:41,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109080943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:41,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241299958] [2022-11-18 20:34:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:41,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:41,675 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:41,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:34:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:34:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:41,874 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 20:34:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 20:34:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-11-18 20:34:42,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241299958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:42,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:42,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-11-18 20:34:42,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579806584] [2022-11-18 20:34:42,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:42,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:34:42,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:42,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:34:42,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:42,469 INFO L87 Difference]: Start difference. First operand 2136 states and 2770 transitions. Second operand has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:34:42,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:42,923 INFO L93 Difference]: Finished difference Result 4146 states and 5271 transitions. [2022-11-18 20:34:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:34:42,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 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 69 [2022-11-18 20:34:42,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:42,931 INFO L225 Difference]: With dead ends: 4146 [2022-11-18 20:34:42,931 INFO L226 Difference]: Without dead ends: 4146 [2022-11-18 20:34:42,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:34:42,933 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 523 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:42,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 624 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:34:42,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4146 states. [2022-11-18 20:34:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4146 to 3102. [2022-11-18 20:34:43,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3102 states, 3091 states have (on average 1.3154318990617924) internal successors, (4066), 3101 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states 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 20:34:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3102 states to 3102 states and 4066 transitions. [2022-11-18 20:34:43,024 INFO L78 Accepts]: Start accepts. Automaton has 3102 states and 4066 transitions. Word has length 69 [2022-11-18 20:34:43,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:43,025 INFO L495 AbstractCegarLoop]: Abstraction has 3102 states and 4066 transitions. [2022-11-18 20:34:43,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 11.4) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states 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 20:34:43,026 INFO L276 IsEmpty]: Start isEmpty. Operand 3102 states and 4066 transitions. [2022-11-18 20:34:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 20:34:43,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:43,030 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 6, 6, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:43,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 20:34:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:43,236 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1779624174, now seen corresponding path program 1 times [2022-11-18 20:34:43,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449151944] [2022-11-18 20:34:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:43,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-18 20:34:43,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:43,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449151944] [2022-11-18 20:34:43,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449151944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:43,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:34:43,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:34:43,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319318352] [2022-11-18 20:34:43,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:43,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:34:43,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:43,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:34:43,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:34:43,420 INFO L87 Difference]: Start difference. First operand 3102 states and 4066 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:34:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:43,565 INFO L93 Difference]: Finished difference Result 6805 states and 8699 transitions. [2022-11-18 20:34:43,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:34:43,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 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 88 [2022-11-18 20:34:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:43,579 INFO L225 Difference]: With dead ends: 6805 [2022-11-18 20:34:43,579 INFO L226 Difference]: Without dead ends: 6805 [2022-11-18 20:34:43,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:43,580 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 198 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:43,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 406 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:34:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6805 states. [2022-11-18 20:34:43,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6805 to 3244. [2022-11-18 20:34:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3233 states have (on average 1.3201360965047944) internal successors, (4268), 3243 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states 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 20:34:43,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4268 transitions. [2022-11-18 20:34:43,652 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4268 transitions. Word has length 88 [2022-11-18 20:34:43,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:43,653 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4268 transitions. [2022-11-18 20:34:43,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states 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 20:34:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4268 transitions. [2022-11-18 20:34:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-18 20:34:43,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:43,656 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-18 20:34:43,656 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash -93068261, now seen corresponding path program 1 times [2022-11-18 20:34:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:43,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911999479] [2022-11-18 20:34:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:43,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 61 proven. 147 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-18 20:34:43,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911999479] [2022-11-18 20:34:43,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911999479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:43,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72792584] [2022-11-18 20:34:43,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:43,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:43,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:43,927 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:43,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:34:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:44,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:34:44,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-11-18 20:34:44,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:34:44,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72792584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:34:44,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:34:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-18 20:34:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494035110] [2022-11-18 20:34:44,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:34:44,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:34:44,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:44,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:34:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:34:44,187 INFO L87 Difference]: Start difference. First operand 3244 states and 4268 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:44,220 INFO L93 Difference]: Finished difference Result 3609 states and 4617 transitions. [2022-11-18 20:34:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:34:44,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-11-18 20:34:44,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:44,228 INFO L225 Difference]: With dead ends: 3609 [2022-11-18 20:34:44,229 INFO L226 Difference]: Without dead ends: 3609 [2022-11-18 20:34:44,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:34:44,230 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 54 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:44,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:34:44,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2022-11-18 20:34:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3280. [2022-11-18 20:34:44,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3269 states have (on average 1.2970327317222392) internal successors, (4240), 3279 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states 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 20:34:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 4240 transitions. [2022-11-18 20:34:44,286 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 4240 transitions. Word has length 96 [2022-11-18 20:34:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:44,287 INFO L495 AbstractCegarLoop]: Abstraction has 3280 states and 4240 transitions. [2022-11-18 20:34:44,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:44,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 4240 transitions. [2022-11-18 20:34:44,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-18 20:34:44,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:44,290 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:44,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:44,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:34:44,498 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:44,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1826247984, now seen corresponding path program 1 times [2022-11-18 20:34:44,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:44,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610000020] [2022-11-18 20:34:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-18 20:34:44,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:44,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610000020] [2022-11-18 20:34:44,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610000020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:44,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800646816] [2022-11-18 20:34:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:44,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:44,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:44,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:44,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:34:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:44,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:34:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:45,061 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-18 20:34:45,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 73 proven. 65 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-11-18 20:34:45,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800646816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:45,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:45,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-18 20:34:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587616640] [2022-11-18 20:34:45,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:45,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:34:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:45,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:34:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:34:45,204 INFO L87 Difference]: Start difference. First operand 3280 states and 4240 transitions. Second operand has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 20:34:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:45,590 INFO L93 Difference]: Finished difference Result 3904 states and 4668 transitions. [2022-11-18 20:34:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:34:45,596 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 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 98 [2022-11-18 20:34:45,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:45,603 INFO L225 Difference]: With dead ends: 3904 [2022-11-18 20:34:45,603 INFO L226 Difference]: Without dead ends: 3904 [2022-11-18 20:34:45,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:34:45,604 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 737 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2344 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:45,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 2344 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2022-11-18 20:34:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 2228. [2022-11-18 20:34:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2218 states have (on average 1.21190261496844) internal successors, (2688), 2227 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states 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 20:34:45,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2688 transitions. [2022-11-18 20:34:45,650 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2688 transitions. Word has length 98 [2022-11-18 20:34:45,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:45,650 INFO L495 AbstractCegarLoop]: Abstraction has 2228 states and 2688 transitions. [2022-11-18 20:34:45,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.583333333333334) internal successors, (103), 12 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 20:34:45,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2688 transitions. [2022-11-18 20:34:45,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 20:34:45,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:45,655 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:45,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:45,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:34:45,867 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:45,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:45,867 INFO L85 PathProgramCache]: Analyzing trace with hash -932844676, now seen corresponding path program 1 times [2022-11-18 20:34:45,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:45,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607476116] [2022-11-18 20:34:45,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:45,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:46,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607476116] [2022-11-18 20:34:46,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607476116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:46,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956104824] [2022-11-18 20:34:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:46,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:46,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:46,075 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:46,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:34:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:46,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:34:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:46,272 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 20:34:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:46,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956104824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:46,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:46,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-18 20:34:46,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602998680] [2022-11-18 20:34:46,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:46,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:34:46,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:34:46,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:34:46,675 INFO L87 Difference]: Start difference. First operand 2228 states and 2688 transitions. Second operand has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 20:34:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:47,030 INFO L93 Difference]: Finished difference Result 3146 states and 3743 transitions. [2022-11-18 20:34:47,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:34:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 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 111 [2022-11-18 20:34:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:47,037 INFO L225 Difference]: With dead ends: 3146 [2022-11-18 20:34:47,037 INFO L226 Difference]: Without dead ends: 3146 [2022-11-18 20:34:47,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:34:47,038 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 327 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:47,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 409 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:34:47,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-18 20:34:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2229. [2022-11-18 20:34:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2229 states, 2220 states have (on average 1.212162162162162) internal successors, (2691), 2228 states have internal predecessors, (2691), 0 states have call successors, (0), 0 states 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 20:34:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2691 transitions. [2022-11-18 20:34:47,104 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2691 transitions. Word has length 111 [2022-11-18 20:34:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:47,105 INFO L495 AbstractCegarLoop]: Abstraction has 2229 states and 2691 transitions. [2022-11-18 20:34:47,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.4) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 20:34:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2691 transitions. [2022-11-18 20:34:47,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-18 20:34:47,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:47,108 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:47,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:47,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:34:47,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:47,316 INFO L85 PathProgramCache]: Analyzing trace with hash -932844675, now seen corresponding path program 1 times [2022-11-18 20:34:47,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:47,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438532614] [2022-11-18 20:34:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:47,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:47,719 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:47,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:47,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438532614] [2022-11-18 20:34:47,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438532614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:47,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289629621] [2022-11-18 20:34:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:47,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:47,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:47,722 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:47,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:34:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:47,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:34:47,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:48,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:48,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289629621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:48,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:48,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 16 [2022-11-18 20:34:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543602618] [2022-11-18 20:34:48,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:48,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:34:48,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:48,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:34:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:34:48,970 INFO L87 Difference]: Start difference. First operand 2229 states and 2691 transitions. Second operand has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 20:34:50,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:50,180 INFO L93 Difference]: Finished difference Result 6465 states and 7732 transitions. [2022-11-18 20:34:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:34:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 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 111 [2022-11-18 20:34:50,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:50,200 INFO L225 Difference]: With dead ends: 6465 [2022-11-18 20:34:50,201 INFO L226 Difference]: Without dead ends: 6465 [2022-11-18 20:34:50,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=374, Invalid=958, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:34:50,202 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 1149 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:50,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 1168 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:34:50,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6465 states. [2022-11-18 20:34:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6465 to 2385. [2022-11-18 20:34:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2175925925925926) internal successors, (2893), 2384 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states 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 20:34:50,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2893 transitions. [2022-11-18 20:34:50,288 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2893 transitions. Word has length 111 [2022-11-18 20:34:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:50,289 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2893 transitions. [2022-11-18 20:34:50,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.4375) internal successors, (183), 17 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 20:34:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2893 transitions. [2022-11-18 20:34:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-18 20:34:50,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:50,293 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:50,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:50,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:34:50,500 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:50,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:50,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1146584722, now seen corresponding path program 1 times [2022-11-18 20:34:50,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:50,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108123476] [2022-11-18 20:34:50,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:50,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 28 proven. 213 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-11-18 20:34:50,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:50,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108123476] [2022-11-18 20:34:50,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108123476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:50,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355095087] [2022-11-18 20:34:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:50,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:50,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:50,822 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:50,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:34:51,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:34:51,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:51,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:51,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355095087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:51,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:51,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2022-11-18 20:34:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118623563] [2022-11-18 20:34:51,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:34:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:51,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:34:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:34:51,348 INFO L87 Difference]: Start difference. First operand 2385 states and 2893 transitions. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 20:34:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:52,604 INFO L93 Difference]: Finished difference Result 5270 states and 6298 transitions. [2022-11-18 20:34:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:34:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 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 112 [2022-11-18 20:34:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:52,614 INFO L225 Difference]: With dead ends: 5270 [2022-11-18 20:34:52,614 INFO L226 Difference]: Without dead ends: 5270 [2022-11-18 20:34:52,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=512, Invalid=1468, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:34:52,617 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 622 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:52,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 1267 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:34:52,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2022-11-18 20:34:52,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 2385. [2022-11-18 20:34:52,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2376 states have (on average 1.2146464646464648) internal successors, (2886), 2384 states have internal predecessors, (2886), 0 states have call successors, (0), 0 states 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 20:34:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 2886 transitions. [2022-11-18 20:34:52,665 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 2886 transitions. Word has length 112 [2022-11-18 20:34:52,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:52,665 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 2886 transitions. [2022-11-18 20:34:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 20:34:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 2886 transitions. [2022-11-18 20:34:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 20:34:52,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:52,669 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:52,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:52,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:34:52,875 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:52,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1937224330, now seen corresponding path program 1 times [2022-11-18 20:34:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727861549] [2022-11-18 20:34:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:52,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:53,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:53,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727861549] [2022-11-18 20:34:53,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727861549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:53,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528696022] [2022-11-18 20:34:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:53,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:53,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:53,185 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:53,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:34:53,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:53,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:34:53,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:53,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 48 proven. 188 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:53,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528696022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:53,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:53,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-18 20:34:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810255497] [2022-11-18 20:34:53,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:34:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:34:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:34:53,865 INFO L87 Difference]: Start difference. First operand 2385 states and 2886 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:34:54,163 INFO L93 Difference]: Finished difference Result 4569 states and 5488 transitions. [2022-11-18 20:34:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:34:54,164 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-11-18 20:34:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:34:54,170 INFO L225 Difference]: With dead ends: 4569 [2022-11-18 20:34:54,170 INFO L226 Difference]: Without dead ends: 4569 [2022-11-18 20:34:54,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 229 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:34:54,171 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 537 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:34:54,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 266 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:34:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4569 states. [2022-11-18 20:34:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4569 to 2386. [2022-11-18 20:34:54,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2377 states have (on average 1.2145561632309634) internal successors, (2887), 2385 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states 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 20:34:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2887 transitions. [2022-11-18 20:34:54,235 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2887 transitions. Word has length 114 [2022-11-18 20:34:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:34:54,235 INFO L495 AbstractCegarLoop]: Abstraction has 2386 states and 2887 transitions. [2022-11-18 20:34:54,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:34:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2887 transitions. [2022-11-18 20:34:54,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 20:34:54,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:34:54,239 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:34:54,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:34:54,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:54,447 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:34:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:34:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash -374280255, now seen corresponding path program 1 times [2022-11-18 20:34:54,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:34:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049151550] [2022-11-18 20:34:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:54,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:34:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 41 proven. 275 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:34:56,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:34:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049151550] [2022-11-18 20:34:56,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049151550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:34:56,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474057617] [2022-11-18 20:34:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:34:56,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:34:56,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:34:56,651 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:34:56,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:34:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:34:56,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:34:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:34:57,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:34:57,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:34:57,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:34:57,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:34:57,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:34:57,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:34:57,821 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:57,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:34:57,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-18 20:34:57,946 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 20:34:57,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-18 20:34:57,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:34:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 46 proven. 192 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:34:58,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474057617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:34:58,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:34:58,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 25 [2022-11-18 20:34:58,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070894547] [2022-11-18 20:34:58,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:34:58,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:34:58,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:34:58,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:34:58,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:34:58,619 INFO L87 Difference]: Start difference. First operand 2386 states and 2887 transitions. Second operand has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 20:35:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:03,448 INFO L93 Difference]: Finished difference Result 7362 states and 8650 transitions. [2022-11-18 20:35:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:35:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 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 117 [2022-11-18 20:35:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:03,458 INFO L225 Difference]: With dead ends: 7362 [2022-11-18 20:35:03,459 INFO L226 Difference]: Without dead ends: 7362 [2022-11-18 20:35:03,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1119, Invalid=4581, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:35:03,461 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 1558 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 2376 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:03,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1558 Valid, 2376 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1442 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 20:35:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7362 states. [2022-11-18 20:35:03,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7362 to 2950. [2022-11-18 20:35:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2941 states have (on average 1.213532811968718) internal successors, (3569), 2949 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states 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 20:35:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 3569 transitions. [2022-11-18 20:35:03,520 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 3569 transitions. Word has length 117 [2022-11-18 20:35:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:03,520 INFO L495 AbstractCegarLoop]: Abstraction has 2950 states and 3569 transitions. [2022-11-18 20:35:03,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.461538461538462) internal successors, (168), 25 states have internal predecessors, (168), 0 states have call successors, (0), 0 states 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 20:35:03,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 3569 transitions. [2022-11-18 20:35:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-18 20:35:03,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:03,524 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 8, 7, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:03,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:03,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:03,731 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash 779532359, now seen corresponding path program 1 times [2022-11-18 20:35:03,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:03,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654164773] [2022-11-18 20:35:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:03,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 84 proven. 313 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:35:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:04,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654164773] [2022-11-18 20:35:04,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654164773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:04,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457052967] [2022-11-18 20:35:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:04,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:04,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:04,610 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:04,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:35:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:04,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:35:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:05,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:05,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:05,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:05,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:35:05,360 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:05,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:35:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 80 proven. 317 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:35:05,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:06,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 20:35:06,642 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 20 treesize of output 16 [2022-11-18 20:35:06,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-18 20:35:06,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:35:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 76 proven. 321 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 20:35:07,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457052967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:07,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:07,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-11-18 20:35:07,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248763322] [2022-11-18 20:35:07,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:07,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:35:07,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:07,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:35:07,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:35:07,124 INFO L87 Difference]: Start difference. First operand 2950 states and 3569 transitions. Second operand has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 20:35:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:12,118 INFO L93 Difference]: Finished difference Result 18632 states and 21766 transitions. [2022-11-18 20:35:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 20:35:12,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 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 117 [2022-11-18 20:35:12,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:12,140 INFO L225 Difference]: With dead ends: 18632 [2022-11-18 20:35:12,140 INFO L226 Difference]: Without dead ends: 18632 [2022-11-18 20:35:12,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3778 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1649, Invalid=10123, Unknown=0, NotChecked=0, Total=11772 [2022-11-18 20:35:12,144 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 2938 mSDsluCounter, 3098 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2938 SdHoareTripleChecker+Valid, 3282 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:12,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2938 Valid, 3282 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1405 Invalid, 0 Unknown, 193 Unchecked, 1.5s Time] [2022-11-18 20:35:12,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18632 states. [2022-11-18 20:35:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18632 to 9743. [2022-11-18 20:35:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9743 states, 9734 states have (on average 1.2055681117731663) internal successors, (11735), 9742 states have internal predecessors, (11735), 0 states have call successors, (0), 0 states 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 20:35:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9743 states to 9743 states and 11735 transitions. [2022-11-18 20:35:12,324 INFO L78 Accepts]: Start accepts. Automaton has 9743 states and 11735 transitions. Word has length 117 [2022-11-18 20:35:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:12,325 INFO L495 AbstractCegarLoop]: Abstraction has 9743 states and 11735 transitions. [2022-11-18 20:35:12,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.76) internal successors, (219), 24 states have internal predecessors, (219), 0 states have call successors, (0), 0 states 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 20:35:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 9743 states and 11735 transitions. [2022-11-18 20:35:12,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-18 20:35:12,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:12,333 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:12,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:12,540 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:12,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:12,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1282212589, now seen corresponding path program 1 times [2022-11-18 20:35:12,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:12,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207156546] [2022-11-18 20:35:12,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:12,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:35:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207156546] [2022-11-18 20:35:12,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207156546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:12,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500701199] [2022-11-18 20:35:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:12,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:12,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:12,899 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:12,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:35:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:35:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:13,339 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 13 treesize of output 9 [2022-11-18 20:35:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-18 20:35:13,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:13,566 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~x1~0.base_28 Int)) (or (not (= (select |c_#valid| v_~x1~0.base_28) 0)) (= (store |c_#valid| v_~x1~0.base_28 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-18 20:35:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 97 trivial. 48 not checked. [2022-11-18 20:35:13,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500701199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:13,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:13,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 8 [2022-11-18 20:35:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952958271] [2022-11-18 20:35:13,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:13,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:35:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:13,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:35:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2022-11-18 20:35:13,628 INFO L87 Difference]: Start difference. First operand 9743 states and 11735 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 20:35:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:14,208 INFO L93 Difference]: Finished difference Result 21673 states and 26021 transitions. [2022-11-18 20:35:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:35:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 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 118 [2022-11-18 20:35:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:14,256 INFO L225 Difference]: With dead ends: 21673 [2022-11-18 20:35:14,256 INFO L226 Difference]: Without dead ends: 21655 [2022-11-18 20:35:14,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=201, Unknown=1, NotChecked=30, Total=306 [2022-11-18 20:35:14,257 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 412 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:14,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 666 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 238 Unchecked, 0.3s Time] [2022-11-18 20:35:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21655 states. [2022-11-18 20:35:14,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21655 to 16568. [2022-11-18 20:35:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16568 states, 16559 states have (on average 1.2045413370372606) internal successors, (19946), 16567 states have internal predecessors, (19946), 0 states have call successors, (0), 0 states 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 20:35:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16568 states to 16568 states and 19946 transitions. [2022-11-18 20:35:14,510 INFO L78 Accepts]: Start accepts. Automaton has 16568 states and 19946 transitions. Word has length 118 [2022-11-18 20:35:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:14,510 INFO L495 AbstractCegarLoop]: Abstraction has 16568 states and 19946 transitions. [2022-11-18 20:35:14,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states 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 20:35:14,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16568 states and 19946 transitions. [2022-11-18 20:35:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-18 20:35:14,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:14,526 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 8, 8, 8, 7, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:14,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:14,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:14,734 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:14,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:14,734 INFO L85 PathProgramCache]: Analyzing trace with hash -224880734, now seen corresponding path program 1 times [2022-11-18 20:35:14,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:14,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927932516] [2022-11-18 20:35:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:14,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-18 20:35:15,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927932516] [2022-11-18 20:35:15,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927932516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:15,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835371553] [2022-11-18 20:35:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:15,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:15,084 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:15,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:35:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:15,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:35:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 335 proven. 4 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-18 20:35:15,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-11-18 20:35:15,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835371553] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:15,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:35:15,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 9 [2022-11-18 20:35:15,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311810350] [2022-11-18 20:35:15,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:15,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:35:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:35:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:35:15,439 INFO L87 Difference]: Start difference. First operand 16568 states and 19946 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:15,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:15,580 INFO L93 Difference]: Finished difference Result 11810 states and 14113 transitions. [2022-11-18 20:35:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:35:15,581 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2022-11-18 20:35:15,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:15,595 INFO L225 Difference]: With dead ends: 11810 [2022-11-18 20:35:15,595 INFO L226 Difference]: Without dead ends: 11810 [2022-11-18 20:35:15,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:35:15,596 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 134 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:15,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 464 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:35:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11810 states. [2022-11-18 20:35:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11810 to 10281. [2022-11-18 20:35:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10281 states, 10272 states have (on average 1.1936331775700935) internal successors, (12261), 10280 states have internal predecessors, (12261), 0 states have call successors, (0), 0 states 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 20:35:15,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10281 states to 10281 states and 12261 transitions. [2022-11-18 20:35:15,738 INFO L78 Accepts]: Start accepts. Automaton has 10281 states and 12261 transitions. Word has length 146 [2022-11-18 20:35:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:15,739 INFO L495 AbstractCegarLoop]: Abstraction has 10281 states and 12261 transitions. [2022-11-18 20:35:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:35:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 10281 states and 12261 transitions. [2022-11-18 20:35:15,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-11-18 20:35:15,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:15,747 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 9, 9, 7, 6, 6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:15,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:15,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:15,954 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 368256012, now seen corresponding path program 2 times [2022-11-18 20:35:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:15,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085573104] [2022-11-18 20:35:15,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:15,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 336 proven. 3 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-11-18 20:35:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:16,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085573104] [2022-11-18 20:35:16,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085573104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:16,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593573823] [2022-11-18 20:35:16,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:35:16,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:16,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:16,213 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:16,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:35:16,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:35:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:35:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:35:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:35:16,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:16,862 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 291 proven. 109 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-11-18 20:35:16,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593573823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:16,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:16,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-11-18 20:35:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122601203] [2022-11-18 20:35:16,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:16,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:35:16,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:16,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:35:16,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:35:16,866 INFO L87 Difference]: Start difference. First operand 10281 states and 12261 transitions. Second operand has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 20:35:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:17,229 INFO L93 Difference]: Finished difference Result 12200 states and 14033 transitions. [2022-11-18 20:35:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:35:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 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 155 [2022-11-18 20:35:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:17,244 INFO L225 Difference]: With dead ends: 12200 [2022-11-18 20:35:17,245 INFO L226 Difference]: Without dead ends: 12200 [2022-11-18 20:35:17,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:35:17,246 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 895 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:17,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1751 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:35:17,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12200 states. [2022-11-18 20:35:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12200 to 8727. [2022-11-18 20:35:17,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8727 states, 8718 states have (on average 1.154393209451709) internal successors, (10064), 8726 states have internal predecessors, (10064), 0 states have call successors, (0), 0 states 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 20:35:17,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8727 states to 8727 states and 10064 transitions. [2022-11-18 20:35:17,413 INFO L78 Accepts]: Start accepts. Automaton has 8727 states and 10064 transitions. Word has length 155 [2022-11-18 20:35:17,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:17,413 INFO L495 AbstractCegarLoop]: Abstraction has 8727 states and 10064 transitions. [2022-11-18 20:35:17,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.0) internal successors, (130), 13 states have internal predecessors, (130), 0 states have call successors, (0), 0 states 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 20:35:17,414 INFO L276 IsEmpty]: Start isEmpty. Operand 8727 states and 10064 transitions. [2022-11-18 20:35:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 20:35:17,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:17,420 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:17,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:17,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:35:17,626 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:17,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1761139834, now seen corresponding path program 1 times [2022-11-18 20:35:17,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:17,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633617948] [2022-11-18 20:35:17,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:17,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 679 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:35:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:19,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633617948] [2022-11-18 20:35:19,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633617948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:19,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728862233] [2022-11-18 20:35:19,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:19,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:19,198 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:19,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:35:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:35:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:19,509 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 20:35:19,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:19,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:20,135 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:35:20,135 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 11 treesize of output 11 [2022-11-18 20:35:20,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:20,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:35:20,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:35:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 673 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:35:20,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:21,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:21,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:21,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-18 20:35:21,844 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 11 treesize of output 7 [2022-11-18 20:35:21,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:21,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:21,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:35:21,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-18 20:35:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 668 refuted. 15 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-18 20:35:22,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728862233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:22,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:22,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-11-18 20:35:22,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851020216] [2022-11-18 20:35:22,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:22,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:35:22,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:22,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:35:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=482, Unknown=8, NotChecked=0, Total=552 [2022-11-18 20:35:22,365 INFO L87 Difference]: Start difference. First operand 8727 states and 10064 transitions. Second operand has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 20:35:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:24,505 INFO L93 Difference]: Finished difference Result 26882 states and 30494 transitions. [2022-11-18 20:35:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:35:24,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 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 162 [2022-11-18 20:35:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:24,528 INFO L225 Difference]: With dead ends: 26882 [2022-11-18 20:35:24,529 INFO L226 Difference]: Without dead ends: 26882 [2022-11-18 20:35:24,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=633, Invalid=3265, Unknown=8, NotChecked=0, Total=3906 [2022-11-18 20:35:24,530 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 2091 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2091 SdHoareTripleChecker+Valid, 2946 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:24,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2091 Valid, 2946 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 765 Invalid, 0 Unknown, 548 Unchecked, 0.7s Time] [2022-11-18 20:35:24,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26882 states. [2022-11-18 20:35:24,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26882 to 14607. [2022-11-18 20:35:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14607 states, 14598 states have (on average 1.1468009316344705) internal successors, (16741), 14606 states have internal predecessors, (16741), 0 states have call successors, (0), 0 states 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 20:35:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14607 states to 14607 states and 16741 transitions. [2022-11-18 20:35:24,772 INFO L78 Accepts]: Start accepts. Automaton has 14607 states and 16741 transitions. Word has length 162 [2022-11-18 20:35:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:24,772 INFO L495 AbstractCegarLoop]: Abstraction has 14607 states and 16741 transitions. [2022-11-18 20:35:24,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.625) internal successors, (231), 23 states have internal predecessors, (231), 0 states have call successors, (0), 0 states 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 20:35:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 14607 states and 16741 transitions. [2022-11-18 20:35:24,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 20:35:24,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:24,782 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:24,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:24,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:35:24,988 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1850586310, now seen corresponding path program 2 times [2022-11-18 20:35:24,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:24,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340944372] [2022-11-18 20:35:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 685 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:35:26,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:26,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340944372] [2022-11-18 20:35:26,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340944372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:26,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57023075] [2022-11-18 20:35:26,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:35:26,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:26,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:26,495 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:26,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:35:26,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:35:26,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:35:26,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:35:26,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:26,836 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 20:35:27,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:27,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:27,292 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:35:27,293 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 11 treesize of output 11 [2022-11-18 20:35:27,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:27,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 20:35:27,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-18 20:35:27,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:35:27,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:35:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 100 proven. 679 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-18 20:35:27,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:28,224 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1471 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1471) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1472 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1472) c_~S~0.base) .cse0))))) is different from false [2022-11-18 20:35:28,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:28,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:28,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-18 20:35:28,848 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 11 treesize of output 7 [2022-11-18 20:35:28,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:28,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:28,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:35:28,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-18 20:35:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 458 refuted. 0 times theorem prover too weak. 50 trivial. 231 not checked. [2022-11-18 20:35:29,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57023075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:29,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:29,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-11-18 20:35:29,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405556195] [2022-11-18 20:35:29,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:29,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:35:29,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:35:29,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=442, Unknown=9, NotChecked=42, Total=552 [2022-11-18 20:35:29,322 INFO L87 Difference]: Start difference. First operand 14607 states and 16741 transitions. Second operand has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 20:35:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:32,566 INFO L93 Difference]: Finished difference Result 40634 states and 46182 transitions. [2022-11-18 20:35:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:35:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 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 162 [2022-11-18 20:35:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:32,603 INFO L225 Difference]: With dead ends: 40634 [2022-11-18 20:35:32,603 INFO L226 Difference]: Without dead ends: 40634 [2022-11-18 20:35:32,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=745, Invalid=4933, Unknown=26, NotChecked=148, Total=5852 [2022-11-18 20:35:32,605 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 1229 mSDsluCounter, 5042 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 5343 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1228 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:32,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1229 Valid, 5343 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1558 Invalid, 0 Unknown, 1228 Unchecked, 1.1s Time] [2022-11-18 20:35:32,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40634 states. [2022-11-18 20:35:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40634 to 24381. [2022-11-18 20:35:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24381 states, 24372 states have (on average 1.1422534055473494) internal successors, (27839), 24380 states have internal predecessors, (27839), 0 states have call successors, (0), 0 states 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 20:35:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24381 states to 24381 states and 27839 transitions. [2022-11-18 20:35:32,933 INFO L78 Accepts]: Start accepts. Automaton has 24381 states and 27839 transitions. Word has length 162 [2022-11-18 20:35:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:32,934 INFO L495 AbstractCegarLoop]: Abstraction has 24381 states and 27839 transitions. [2022-11-18 20:35:32,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 9.958333333333334) internal successors, (239), 23 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 20:35:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 24381 states and 27839 transitions. [2022-11-18 20:35:32,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-11-18 20:35:32,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:32,945 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 10, 10, 8, 8, 7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:32,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:33,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 20:35:33,157 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:35:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1229648570, now seen corresponding path program 3 times [2022-11-18 20:35:33,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:33,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137337456] [2022-11-18 20:35:33,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 104 proven. 681 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:35:34,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137337456] [2022-11-18 20:35:34,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137337456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:35:34,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784374190] [2022-11-18 20:35:34,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:35:34,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:34,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:34,464 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:34,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:35:34,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-18 20:35:34,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:35:34,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-18 20:35:34,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:34,951 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 20:35:35,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:35,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:35:35,553 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:35:35,553 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 11 treesize of output 11 [2022-11-18 20:35:35,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:35,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-18 20:35:36,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:36,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:35:36,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:36,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2022-11-18 20:35:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 134 proven. 617 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-11-18 20:35:36,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:35:36,730 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~S~0.offset 4))) (and (forall ((v_ArrVal_1601 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| c_~x1~0.base v_ArrVal_1601) c_~S~0.base) .cse0) 0)) (forall ((v_ArrVal_1600 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| c_~x1~0.base v_ArrVal_1600) c_~S~0.base) .cse0) 0)))) is different from false [2022-11-18 20:35:37,560 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:37,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:37,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-18 20:35:37,573 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 11 treesize of output 7 [2022-11-18 20:35:37,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:35:37,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-18 20:35:37,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:35:37,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2022-11-18 20:35:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 90 proven. 421 refuted. 0 times theorem prover too weak. 78 trivial. 240 not checked. [2022-11-18 20:35:37,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784374190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:35:37,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:35:37,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 26 [2022-11-18 20:35:37,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269784648] [2022-11-18 20:35:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:35:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:35:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:35:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=579, Unknown=1, NotChecked=48, Total=702 [2022-11-18 20:35:37,976 INFO L87 Difference]: Start difference. First operand 24381 states and 27839 transitions. Second operand has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 0 states 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 20:35:59,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:59,124 INFO L93 Difference]: Finished difference Result 109411 states and 124406 transitions. [2022-11-18 20:35:59,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-11-18 20:35:59,125 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 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 162 [2022-11-18 20:35:59,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:59,230 INFO L225 Difference]: With dead ends: 109411 [2022-11-18 20:35:59,230 INFO L226 Difference]: Without dead ends: 109411 [2022-11-18 20:35:59,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 356 SyntacticMatches, 7 SemanticMatches, 242 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 24415 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=5911, Invalid=52792, Unknown=107, NotChecked=482, Total=59292 [2022-11-18 20:35:59,237 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 3271 mSDsluCounter, 11388 mSDsCounter, 0 mSdLazyCounter, 4189 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3271 SdHoareTripleChecker+Valid, 12301 SdHoareTripleChecker+Invalid, 8104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 4189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3679 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:59,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3271 Valid, 12301 Invalid, 8104 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [236 Valid, 4189 Invalid, 0 Unknown, 3679 Unchecked, 3.3s Time] [2022-11-18 20:35:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109411 states. [2022-11-18 20:36:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109411 to 63374. [2022-11-18 20:36:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63374 states, 63365 states have (on average 1.1432967726662984) internal successors, (72445), 63373 states have internal predecessors, (72445), 0 states have call successors, (0), 0 states 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 20:36:00,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63374 states to 63374 states and 72445 transitions. [2022-11-18 20:36:00,338 INFO L78 Accepts]: Start accepts. Automaton has 63374 states and 72445 transitions. Word has length 162 [2022-11-18 20:36:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:00,339 INFO L495 AbstractCegarLoop]: Abstraction has 63374 states and 72445 transitions. [2022-11-18 20:36:00,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.333333333333334) internal successors, (279), 26 states have internal predecessors, (279), 0 states have call successors, (0), 0 states 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 20:36:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 63374 states and 72445 transitions. [2022-11-18 20:36:00,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-18 20:36:00,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:00,357 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:00,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:00,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 20:36:00,565 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:36:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -115562864, now seen corresponding path program 4 times [2022-11-18 20:36:00,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:00,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113866932] [2022-11-18 20:36:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:02,201 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 118 proven. 743 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:36:02,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113866932] [2022-11-18 20:36:02,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113866932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:02,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858933910] [2022-11-18 20:36:02,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:36:02,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:02,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:02,203 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:02,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:36:02,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:36:02,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:02,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-18 20:36:02,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:02,437 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 20:36:02,550 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:36:02,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 20:36:02,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:02,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:36:02,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-18 20:36:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 779 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:36:03,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:03,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-18 20:36:03,839 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 24 treesize of output 20 [2022-11-18 20:36:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 773 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:36:04,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858933910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:04,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:04,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-11-18 20:36:04,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296295964] [2022-11-18 20:36:04,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:04,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-18 20:36:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:04,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-18 20:36:04,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2022-11-18 20:36:04,390 INFO L87 Difference]: Start difference. First operand 63374 states and 72445 transitions. Second operand has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 20:36:07,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:07,756 INFO L93 Difference]: Finished difference Result 97220 states and 111111 transitions. [2022-11-18 20:36:07,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:36:07,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 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 173 [2022-11-18 20:36:07,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:07,847 INFO L225 Difference]: With dead ends: 97220 [2022-11-18 20:36:07,847 INFO L226 Difference]: Without dead ends: 97220 [2022-11-18 20:36:07,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1610, Invalid=5872, Unknown=0, NotChecked=0, Total=7482 [2022-11-18 20:36:07,849 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 1704 mSDsluCounter, 3817 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 4090 SdHoareTripleChecker+Invalid, 2700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:07,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 4090 Invalid, 2700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2094 Invalid, 0 Unknown, 544 Unchecked, 1.4s Time] [2022-11-18 20:36:07,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97220 states. [2022-11-18 20:36:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97220 to 72410. [2022-11-18 20:36:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72410 states, 72401 states have (on average 1.1445422024557672) internal successors, (82866), 72409 states have internal predecessors, (82866), 0 states have call successors, (0), 0 states 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 20:36:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72410 states to 72410 states and 82866 transitions. [2022-11-18 20:36:09,219 INFO L78 Accepts]: Start accepts. Automaton has 72410 states and 82866 transitions. Word has length 173 [2022-11-18 20:36:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:09,220 INFO L495 AbstractCegarLoop]: Abstraction has 72410 states and 82866 transitions. [2022-11-18 20:36:09,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 9.766666666666667) internal successors, (293), 31 states have internal predecessors, (293), 0 states have call successors, (0), 0 states 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 20:36:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 72410 states and 82866 transitions. [2022-11-18 20:36:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-18 20:36:09,237 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:09,237 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 11, 11, 9, 8, 7, 7, 6, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:09,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:09,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 20:36:09,444 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:36:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash -115562863, now seen corresponding path program 1 times [2022-11-18 20:36:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:09,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231943742] [2022-11-18 20:36:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:09,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 117 proven. 744 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-18 20:36:11,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231943742] [2022-11-18 20:36:11,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231943742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:11,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097645680] [2022-11-18 20:36:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:11,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:11,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:11,747 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:11,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:36:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:36:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:12,042 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 20:36:12,417 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:36:12,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-18 20:36:12,435 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:36:12,435 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 11 treesize of output 11 [2022-11-18 20:36:12,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:12,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:13,133 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:36:13,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-18 20:36:13,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:36:13,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-18 20:36:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 82 proven. 787 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 20:36:13,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:14,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-18 20:36:14,706 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 24 treesize of output 20 [2022-11-18 20:36:14,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-18 20:36:14,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-18 20:36:14,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:36:14,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:36:15,986 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 50 treesize of output 46 [2022-11-18 20:36:16,082 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 88 proven. 781 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-18 20:36:16,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097645680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:16,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:16,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 36 [2022-11-18 20:36:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007801979] [2022-11-18 20:36:16,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:16,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:36:16,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:16,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:36:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:36:16,087 INFO L87 Difference]: Start difference. First operand 72410 states and 82866 transitions. Second operand has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 20:36:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:36:50,187 INFO L93 Difference]: Finished difference Result 280652 states and 319916 transitions. [2022-11-18 20:36:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 304 states. [2022-11-18 20:36:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 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 173 [2022-11-18 20:36:50,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:36:50,698 INFO L225 Difference]: With dead ends: 280652 [2022-11-18 20:36:50,698 INFO L226 Difference]: Without dead ends: 280652 [2022-11-18 20:36:50,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 620 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49024 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=22082, Invalid=91824, Unknown=0, NotChecked=0, Total=113906 [2022-11-18 20:36:50,705 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 5815 mSDsluCounter, 7430 mSDsCounter, 0 mSdLazyCounter, 3346 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5815 SdHoareTripleChecker+Valid, 7904 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 3346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1908 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:36:50,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5815 Valid, 7904 Invalid, 5525 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [271 Valid, 3346 Invalid, 0 Unknown, 1908 Unchecked, 3.5s Time] [2022-11-18 20:36:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280652 states. [2022-11-18 20:36:53,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280652 to 166449. [2022-11-18 20:36:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166449 states, 166440 states have (on average 1.146605383321317) internal successors, (190841), 166448 states have internal predecessors, (190841), 0 states have call successors, (0), 0 states 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 20:36:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166449 states to 166449 states and 190841 transitions. [2022-11-18 20:36:54,183 INFO L78 Accepts]: Start accepts. Automaton has 166449 states and 190841 transitions. Word has length 173 [2022-11-18 20:36:54,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:36:54,184 INFO L495 AbstractCegarLoop]: Abstraction has 166449 states and 190841 transitions. [2022-11-18 20:36:54,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 9.86111111111111) internal successors, (355), 37 states have internal predecessors, (355), 0 states have call successors, (0), 0 states 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 20:36:54,185 INFO L276 IsEmpty]: Start isEmpty. Operand 166449 states and 190841 transitions. [2022-11-18 20:36:54,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 20:36:54,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:36:54,211 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:36:54,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:36:54,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:36:54,417 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:36:54,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:36:54,418 INFO L85 PathProgramCache]: Analyzing trace with hash -695935548, now seen corresponding path program 2 times [2022-11-18 20:36:54,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:36:54,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375166856] [2022-11-18 20:36:54,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:36:54,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:36:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:36:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 56 proven. 736 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-18 20:36:55,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:36:55,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375166856] [2022-11-18 20:36:55,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375166856] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:36:55,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687690443] [2022-11-18 20:36:55,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:36:55,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:36:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:36:55,647 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:36:55,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:36:55,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:36:55,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:36:55,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:36:55,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:36:56,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:36:56,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-18 20:36:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 121 proven. 653 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-18 20:36:56,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:36:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 94 proven. 643 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-18 20:36:56,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687690443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:36:56,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:36:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 24 [2022-11-18 20:36:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030891101] [2022-11-18 20:36:56,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:36:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:36:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:36:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:36:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:36:56,587 INFO L87 Difference]: Start difference. First operand 166449 states and 190841 transitions. Second operand has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 20:37:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:02,770 INFO L93 Difference]: Finished difference Result 401644 states and 458040 transitions. [2022-11-18 20:37:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-11-18 20:37:02,770 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 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 174 [2022-11-18 20:37:02,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:03,371 INFO L225 Difference]: With dead ends: 401644 [2022-11-18 20:37:03,371 INFO L226 Difference]: Without dead ends: 401644 [2022-11-18 20:37:03,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8386 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4703, Invalid=19789, Unknown=0, NotChecked=0, Total=24492 [2022-11-18 20:37:03,373 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 1325 mSDsluCounter, 3963 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1325 SdHoareTripleChecker+Valid, 4263 SdHoareTripleChecker+Invalid, 2558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:03,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1325 Valid, 4263 Invalid, 2558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-18 20:37:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401644 states. [2022-11-18 20:37:07,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401644 to 233252. [2022-11-18 20:37:07,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233252 states, 233243 states have (on average 1.147811509884541) internal successors, (267719), 233251 states have internal predecessors, (267719), 0 states have call successors, (0), 0 states 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 20:37:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233252 states to 233252 states and 267719 transitions. [2022-11-18 20:37:08,637 INFO L78 Accepts]: Start accepts. Automaton has 233252 states and 267719 transitions. Word has length 174 [2022-11-18 20:37:08,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:08,637 INFO L495 AbstractCegarLoop]: Abstraction has 233252 states and 267719 transitions. [2022-11-18 20:37:08,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 10.166666666666666) internal successors, (244), 24 states have internal predecessors, (244), 0 states have call successors, (0), 0 states 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 20:37:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 233252 states and 267719 transitions. [2022-11-18 20:37:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 20:37:08,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:08,654 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:08,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-18 20:37:08,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:08,859 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:37:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:08,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1469366084, now seen corresponding path program 3 times [2022-11-18 20:37:08,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:08,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780832773] [2022-11-18 20:37:08,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:08,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 531 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 20:37:09,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:09,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780832773] [2022-11-18 20:37:09,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780832773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:09,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314044111] [2022-11-18 20:37:09,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:37:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:09,057 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:09,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:37:09,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:37:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:37:09,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:09,415 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 20:37:09,512 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:37:09,512 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 11 treesize of output 11 [2022-11-18 20:37:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 20:37:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 532 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-18 20:37:09,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314044111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:09,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:09,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-11-18 20:37:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097051157] [2022-11-18 20:37:09,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:09,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:37:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:09,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:37:09,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:37:09,869 INFO L87 Difference]: Start difference. First operand 233252 states and 267719 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:37:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:11,156 INFO L93 Difference]: Finished difference Result 281830 states and 322061 transitions. [2022-11-18 20:37:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:37:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 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 174 [2022-11-18 20:37:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:11,452 INFO L225 Difference]: With dead ends: 281830 [2022-11-18 20:37:11,452 INFO L226 Difference]: Without dead ends: 281830 [2022-11-18 20:37:11,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:37:11,453 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 285 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:11,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 685 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:37:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281830 states. [2022-11-18 20:37:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281830 to 240631. [2022-11-18 20:37:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240631 states, 240622 states have (on average 1.1450490811314011) internal successors, (275524), 240630 states have internal predecessors, (275524), 0 states have call successors, (0), 0 states 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 20:37:15,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240631 states to 240631 states and 275524 transitions. [2022-11-18 20:37:15,790 INFO L78 Accepts]: Start accepts. Automaton has 240631 states and 275524 transitions. Word has length 174 [2022-11-18 20:37:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:15,790 INFO L495 AbstractCegarLoop]: Abstraction has 240631 states and 275524 transitions. [2022-11-18 20:37:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 0 states have call successors, (0), 0 states 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 20:37:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 240631 states and 275524 transitions. [2022-11-18 20:37:15,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 20:37:15,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:15,802 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 6, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:15,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:16,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-18 20:37:16,002 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:37:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:16,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2129791236, now seen corresponding path program 4 times [2022-11-18 20:37:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:16,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512395296] [2022-11-18 20:37:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:16,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 523 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-18 20:37:16,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512395296] [2022-11-18 20:37:16,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512395296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218616335] [2022-11-18 20:37:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:37:16,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:16,199 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:16,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:37:16,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:37:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:16,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:37:16,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:16,471 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 20:37:16,590 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:37:16,590 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 11 treesize of output 11 [2022-11-18 20:37:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-18 20:37:16,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 199 proven. 524 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-18 20:37:16,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218616335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:16,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:16,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-11-18 20:37:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781033977] [2022-11-18 20:37:16,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:16,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:37:16,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:16,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:37:16,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:37:16,881 INFO L87 Difference]: Start difference. First operand 240631 states and 275524 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 20:37:18,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:18,142 INFO L93 Difference]: Finished difference Result 276900 states and 315977 transitions. [2022-11-18 20:37:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:37:18,142 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 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 174 [2022-11-18 20:37:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:18,420 INFO L225 Difference]: With dead ends: 276900 [2022-11-18 20:37:18,420 INFO L226 Difference]: Without dead ends: 276900 [2022-11-18 20:37:18,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:37:18,421 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 339 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:18,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 679 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:37:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276900 states. [2022-11-18 20:37:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276900 to 173018. [2022-11-18 20:37:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173018 states, 173009 states have (on average 1.1478073395025692) internal successors, (198581), 173017 states have internal predecessors, (198581), 0 states have call successors, (0), 0 states 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 20:37:21,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173018 states to 173018 states and 198581 transitions. [2022-11-18 20:37:21,993 INFO L78 Accepts]: Start accepts. Automaton has 173018 states and 198581 transitions. Word has length 174 [2022-11-18 20:37:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:21,996 INFO L495 AbstractCegarLoop]: Abstraction has 173018 states and 198581 transitions. [2022-11-18 20:37:21,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states 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 20:37:21,997 INFO L276 IsEmpty]: Start isEmpty. Operand 173018 states and 198581 transitions. [2022-11-18 20:37:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-18 20:37:22,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:22,027 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 12, 12, 10, 8, 7, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:22,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:37:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-18 20:37:22,228 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:37:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -668697579, now seen corresponding path program 1 times [2022-11-18 20:37:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:22,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749722782] [2022-11-18 20:37:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 372 proven. 311 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-11-18 20:37:22,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749722782] [2022-11-18 20:37:22,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749722782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:22,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834437405] [2022-11-18 20:37:22,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:22,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:22,468 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:22,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:37:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:37:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-18 20:37:22,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:22,853 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 554 proven. 19 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-18 20:37:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834437405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:22,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:22,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-18 20:37:22,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221569049] [2022-11-18 20:37:22,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:22,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:37:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:22,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:37:22,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:37:22,856 INFO L87 Difference]: Start difference. First operand 173018 states and 198581 transitions. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 20:37:23,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:37:23,608 INFO L93 Difference]: Finished difference Result 30988 states and 35728 transitions. [2022-11-18 20:37:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:37:23,608 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 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 178 [2022-11-18 20:37:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:37:23,632 INFO L225 Difference]: With dead ends: 30988 [2022-11-18 20:37:23,632 INFO L226 Difference]: Without dead ends: 30988 [2022-11-18 20:37:23,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:37:23,633 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 592 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:37:23,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 1658 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:37:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30988 states. [2022-11-18 20:37:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30988 to 11388. [2022-11-18 20:37:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11388 states, 11379 states have (on average 1.1473767466385447) internal successors, (13056), 11387 states have internal predecessors, (13056), 0 states have call successors, (0), 0 states 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 20:37:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11388 states to 11388 states and 13056 transitions. [2022-11-18 20:37:23,775 INFO L78 Accepts]: Start accepts. Automaton has 11388 states and 13056 transitions. Word has length 178 [2022-11-18 20:37:23,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:37:23,775 INFO L495 AbstractCegarLoop]: Abstraction has 11388 states and 13056 transitions. [2022-11-18 20:37:23,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 0 states have call successors, (0), 0 states 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 20:37:23,776 INFO L276 IsEmpty]: Start isEmpty. Operand 11388 states and 13056 transitions. [2022-11-18 20:37:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-18 20:37:23,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:37:23,779 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 13, 13, 10, 8, 8, 7, 6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:37:23,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-18 20:37:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-18 20:37:23,980 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-18 20:37:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:37:23,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1498211354, now seen corresponding path program 5 times [2022-11-18 20:37:23,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:37:23,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103367194] [2022-11-18 20:37:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:37:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:37:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:37:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 286 proven. 800 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2022-11-18 20:37:25,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:37:25,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103367194] [2022-11-18 20:37:25,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103367194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:37:25,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418872362] [2022-11-18 20:37:25,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:37:25,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:37:25,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:37:25,375 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:37:25,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cee77825-cf64-4dda-8322-7cc8ba8bc68b/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:37:26,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:37:26,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:37:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-18 20:37:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:37:26,821 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 20:37:26,822 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 17 treesize of output 21 [2022-11-18 20:37:27,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-18 20:37:27,435 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2022-11-18 20:37:27,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2022-11-18 20:37:27,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-18 20:37:27,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-11-18 20:37:27,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-18 20:37:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 368 proven. 733 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:37:28,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:37:28,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:37:28,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 28 [2022-11-18 20:37:28,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-11-18 20:37:28,874 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 16 treesize of output 12 [2022-11-18 20:37:30,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 245 proven. 825 refuted. 41 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 20:37:30,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418872362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:37:30,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:37:30,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 40 [2022-11-18 20:37:30,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913449689] [2022-11-18 20:37:30,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:37:30,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:37:30,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:37:30,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:37:30,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1455, Unknown=9, NotChecked=0, Total=1640 [2022-11-18 20:37:30,348 INFO L87 Difference]: Start difference. First operand 11388 states and 13056 transitions. Second operand has 41 states, 40 states have (on average 9.575) internal successors, (383), 41 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)