./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:05:55,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:05:55,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:05:55,751 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:05:55,752 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:05:55,757 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:05:55,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:05:55,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:05:55,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:05:55,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:05:55,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:05:55,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:05:55,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:05:55,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:05:55,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:05:55,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:05:55,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:05:55,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:05:55,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:05:55,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:05:55,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:05:55,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:05:55,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:05:55,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:05:55,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:05:55,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:05:55,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:05:55,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:05:55,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:05:55,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:05:55,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:05:55,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:05:55,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:05:55,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:05:55,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:05:55,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:05:55,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:05:55,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:05:55,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:05:55,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:05:55,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:05:55,835 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:05:55,878 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:05:55,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:05:55,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:05:55,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:05:55,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:05:55,881 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:05:55,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:05:55,882 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:05:55,882 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:05:55,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:05:55,884 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:05:55,884 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:05:55,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:05:55,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:05:55,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:05:55,885 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:05:55,885 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:05:55,885 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:05:55,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:05:55,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:05:55,886 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:05:55,886 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:05:55,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:05:55,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:05:55,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:05:55,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:55,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:05:55,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:05:55,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:05:55,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:05:55,890 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_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 402cb3c5f3290109e83e598d96446a87fac59fa4aaa0b6234366e7da005f5688 [2022-11-16 12:05:56,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:05:56,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:05:56,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:05:56,237 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:05:56,238 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:05:56,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-16 12:05:56,319 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/data/f725094dd/d2bc594706dc40768a3ed0a4803f03d3/FLAGe5f7de3cc [2022-11-16 12:05:56,946 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:05:56,958 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/sv-benchmarks/c/pthread/stack_longer-2.i [2022-11-16 12:05:56,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/data/f725094dd/d2bc594706dc40768a3ed0a4803f03d3/FLAGe5f7de3cc [2022-11-16 12:05:57,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/data/f725094dd/d2bc594706dc40768a3ed0a4803f03d3 [2022-11-16 12:05:57,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:05:57,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:05:57,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:57,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:05:57,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:05:57,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:57,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1197a21d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57, skipping insertion in model container [2022-11-16 12:05:57,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:57,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:05:57,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:05:57,756 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-16 12:05:57,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:57,795 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:05:57,829 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/sv-benchmarks/c/pthread/stack_longer-2.i[41529,41542] [2022-11-16 12:05:57,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:05:57,918 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:05:57,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57 WrapperNode [2022-11-16 12:05:57,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:05:57,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:57,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:05:57,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:05:57,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:57,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,021 INFO L138 Inliner]: procedures = 277, calls = 40, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2022-11-16 12:05:58,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:05:58,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:05:58,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:05:58,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:05:58,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,081 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:05:58,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:05:58,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:05:58,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:05:58,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (1/1) ... [2022-11-16 12:05:58,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:05:58,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:58,143 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:05:58,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:05:58,202 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 12:05:58,202 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 12:05:58,202 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 12:05:58,203 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 12:05:58,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:05:58,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:05:58,203 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:05:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:05:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:05:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:05:58,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:05:58,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:05:58,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:05:58,207 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:05:58,427 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:05:58,430 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:05:58,948 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:05:58,959 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:05:58,960 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:05:58,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:58 BoogieIcfgContainer [2022-11-16 12:05:58,962 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:05:58,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:05:58,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:05:58,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:05:58,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:05:57" (1/3) ... [2022-11-16 12:05:58,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbd89f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:58, skipping insertion in model container [2022-11-16 12:05:58,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:05:57" (2/3) ... [2022-11-16 12:05:58,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dbd89f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:05:58, skipping insertion in model container [2022-11-16 12:05:58,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:05:58" (3/3) ... [2022-11-16 12:05:58,978 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-2.i [2022-11-16 12:05:59,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:05:59,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-16 12:05:59,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:05:59,151 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:05:59,217 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:05:59,242 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 188 transitions, 392 flow [2022-11-16 12:05:59,252 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 188 transitions, 392 flow [2022-11-16 12:05:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 188 transitions, 392 flow [2022-11-16 12:05:59,423 INFO L130 PetriNetUnfolder]: 10/186 cut-off events. [2022-11-16 12:05:59,425 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:05:59,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 10/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 488 event pairs, 0 based on Foata normal form. 0/161 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-11-16 12:05:59,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-11-16 12:06:06,631 INFO L134 LiptonReduction]: Checked pairs total: 14668 [2022-11-16 12:06:06,632 INFO L136 LiptonReduction]: Total number of compositions: 192 [2022-11-16 12:06:06,641 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 49 transitions, 114 flow [2022-11-16 12:06:06,707 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,727 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:06:06,735 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;@41f7d3c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:06:06,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-16 12:06:06,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 12:06:06,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:06,748 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 12:06:06,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:06,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:06,755 INFO L85 PathProgramCache]: Analyzing trace with hash 768, now seen corresponding path program 1 times [2022-11-16 12:06:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:06,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653664264] [2022-11-16 12:06:06,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:06,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:06,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653664264] [2022-11-16 12:06:06,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653664264] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:06,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:06,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 12:06:06,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264966439] [2022-11-16 12:06:06,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:06,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:06:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:06,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:06:06,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:06:06,947 INFO L87 Difference]: Start difference. First operand has 782 states, 716 states have (on average 3.1089385474860336) internal successors, (2226), 781 states have internal predecessors, (2226), 0 states have call successors, (0), 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, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:07,132 INFO L93 Difference]: Finished difference Result 780 states and 2224 transitions. [2022-11-16 12:06:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:06:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-16 12:06:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:07,168 INFO L225 Difference]: With dead ends: 780 [2022-11-16 12:06:07,168 INFO L226 Difference]: Without dead ends: 780 [2022-11-16 12:06:07,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:06:07,175 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:07,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-11-16 12:06:07,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2022-11-16 12:06:07,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 716 states have (on average 3.106145251396648) internal successors, (2224), 779 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2224 transitions. [2022-11-16 12:06:07,317 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2224 transitions. Word has length 1 [2022-11-16 12:06:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:07,317 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 2224 transitions. [2022-11-16 12:06:07,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,319 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2224 transitions. [2022-11-16 12:06:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:06:07,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:07,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:06:07,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:06:07,321 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:07,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 756573, now seen corresponding path program 1 times [2022-11-16 12:06:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:07,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358862847] [2022-11-16 12:06:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:07,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:07,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:07,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358862847] [2022-11-16 12:06:07,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358862847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:07,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:07,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:06:07,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379704487] [2022-11-16 12:06:07,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:07,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:07,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:07,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:07,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:07,704 INFO L87 Difference]: Start difference. First operand 780 states and 2224 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:07,799 INFO L93 Difference]: Finished difference Result 754 states and 2169 transitions. [2022-11-16 12:06:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:06:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:07,807 INFO L225 Difference]: With dead ends: 754 [2022-11-16 12:06:07,807 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 12:06:07,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:07,809 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:07,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 12:06:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-16 12:06:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 698 states have (on average 3.1074498567335245) internal successors, (2169), 753 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2169 transitions. [2022-11-16 12:06:07,839 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2169 transitions. Word has length 3 [2022-11-16 12:06:07,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:07,839 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2169 transitions. [2022-11-16 12:06:07,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:07,840 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2169 transitions. [2022-11-16 12:06:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 12:06:07,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:07,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 12:06:07,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:06:07,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:07,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash 756575, now seen corresponding path program 1 times [2022-11-16 12:06:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:07,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825417093] [2022-11-16 12:06:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825417093] [2022-11-16 12:06:08,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825417093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:06:08,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471472745] [2022-11-16 12:06:08,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:08,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:08,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:08,052 INFO L87 Difference]: Start difference. First operand 754 states and 2169 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,142 INFO L93 Difference]: Finished difference Result 728 states and 2114 transitions. [2022-11-16 12:06:08,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:08,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 12:06:08,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,150 INFO L225 Difference]: With dead ends: 728 [2022-11-16 12:06:08,150 INFO L226 Difference]: Without dead ends: 728 [2022-11-16 12:06:08,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:08,155 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:08,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-16 12:06:08,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-11-16 12:06:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 680 states have (on average 3.1088235294117648) internal successors, (2114), 727 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2114 transitions. [2022-11-16 12:06:08,186 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2114 transitions. Word has length 3 [2022-11-16 12:06:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 2114 transitions. [2022-11-16 12:06:08,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,189 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2114 transitions. [2022-11-16 12:06:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:06:08,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:08,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:06:08,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:06:08,191 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash 727085208, now seen corresponding path program 1 times [2022-11-16 12:06:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300611083] [2022-11-16 12:06:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300611083] [2022-11-16 12:06:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300611083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:08,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229776579] [2022-11-16 12:06:08,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:08,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,349 INFO L87 Difference]: Start difference. First operand 728 states and 2114 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,433 INFO L93 Difference]: Finished difference Result 560 states and 1572 transitions. [2022-11-16 12:06:08,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:08,438 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:06:08,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,442 INFO L225 Difference]: With dead ends: 560 [2022-11-16 12:06:08,442 INFO L226 Difference]: Without dead ends: 560 [2022-11-16 12:06:08,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,446 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:08,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-16 12:06:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-11-16 12:06:08,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 528 states have (on average 2.977272727272727) internal successors, (1572), 559 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1572 transitions. [2022-11-16 12:06:08,471 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1572 transitions. Word has length 5 [2022-11-16 12:06:08,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:08,472 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 1572 transitions. [2022-11-16 12:06:08,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1572 transitions. [2022-11-16 12:06:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:06:08,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:08,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:06:08,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:06:08,474 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:08,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash 727085209, now seen corresponding path program 1 times [2022-11-16 12:06:08,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128002165] [2022-11-16 12:06:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128002165] [2022-11-16 12:06:08,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128002165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:08,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611889875] [2022-11-16 12:06:08,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:08,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,604 INFO L87 Difference]: Start difference. First operand 560 states and 1572 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,678 INFO L93 Difference]: Finished difference Result 392 states and 1030 transitions. [2022-11-16 12:06:08,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 12:06:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,682 INFO L225 Difference]: With dead ends: 392 [2022-11-16 12:06:08,682 INFO L226 Difference]: Without dead ends: 392 [2022-11-16 12:06:08,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:08,683 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:08,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-16 12:06:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-11-16 12:06:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 376 states have (on average 2.7393617021276597) internal successors, (1030), 391 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1030 transitions. [2022-11-16 12:06:08,698 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1030 transitions. Word has length 5 [2022-11-16 12:06:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 1030 transitions. [2022-11-16 12:06:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1030 transitions. [2022-11-16 12:06:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:08,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:08,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:08,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:06:08,701 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:08,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1064129270, now seen corresponding path program 1 times [2022-11-16 12:06:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369428296] [2022-11-16 12:06:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:08,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:08,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369428296] [2022-11-16 12:06:08,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369428296] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:08,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:08,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:08,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112627291] [2022-11-16 12:06:08,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:08,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:08,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:08,755 INFO L87 Difference]: Start difference. First operand 392 states and 1030 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:08,891 INFO L93 Difference]: Finished difference Result 558 states and 1422 transitions. [2022-11-16 12:06:08,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:08,895 INFO L225 Difference]: With dead ends: 558 [2022-11-16 12:06:08,895 INFO L226 Difference]: Without dead ends: 558 [2022-11-16 12:06:08,895 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 [2022-11-16 12:06:08,896 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:08,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-16 12:06:08,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2022-11-16 12:06:08,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 504 states have (on average 2.7301587301587302) internal successors, (1376), 519 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1376 transitions. [2022-11-16 12:06:08,917 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1376 transitions. Word has length 6 [2022-11-16 12:06:08,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:08,918 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1376 transitions. [2022-11-16 12:06:08,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:08,918 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1376 transitions. [2022-11-16 12:06:08,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:08,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:08,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:08,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:06:08,919 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:08,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:08,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1064127968, now seen corresponding path program 1 times [2022-11-16 12:06:08,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:08,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103788030] [2022-11-16 12:06:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:08,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:09,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:09,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103788030] [2022-11-16 12:06:09,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103788030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773124635] [2022-11-16 12:06:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:09,153 INFO L87 Difference]: Start difference. First operand 520 states and 1376 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:09,264 INFO L93 Difference]: Finished difference Result 503 states and 1323 transitions. [2022-11-16 12:06:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:09,268 INFO L225 Difference]: With dead ends: 503 [2022-11-16 12:06:09,268 INFO L226 Difference]: Without dead ends: 503 [2022-11-16 12:06:09,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:09,270 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:09,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 3 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-16 12:06:09,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 478. [2022-11-16 12:06:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 466 states have (on average 2.7145922746781115) internal successors, (1265), 477 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1265 transitions. [2022-11-16 12:06:09,290 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1265 transitions. Word has length 6 [2022-11-16 12:06:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:09,290 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 1265 transitions. [2022-11-16 12:06:09,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,291 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1265 transitions. [2022-11-16 12:06:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:06:09,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:09,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:06:09,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:06:09,292 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1064127969, now seen corresponding path program 1 times [2022-11-16 12:06:09,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:09,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054521444] [2022-11-16 12:06:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:09,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:09,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054521444] [2022-11-16 12:06:09,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054521444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:09,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134777103] [2022-11-16 12:06:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:06:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:06:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:06:09,658 INFO L87 Difference]: Start difference. First operand 478 states and 1265 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:09,832 INFO L93 Difference]: Finished difference Result 540 states and 1414 transitions. [2022-11-16 12:06:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:06:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 12:06:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:09,839 INFO L225 Difference]: With dead ends: 540 [2022-11-16 12:06:09,839 INFO L226 Difference]: Without dead ends: 540 [2022-11-16 12:06:09,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:09,840 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:09,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-16 12:06:09,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 498. [2022-11-16 12:06:09,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 486 states have (on average 2.7242798353909463) internal successors, (1324), 497 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1324 transitions. [2022-11-16 12:06:09,859 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1324 transitions. Word has length 6 [2022-11-16 12:06:09,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:09,859 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1324 transitions. [2022-11-16 12:06:09,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:09,860 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1324 transitions. [2022-11-16 12:06:09,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 12:06:09,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:09,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:09,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:06:09,863 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:09,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 152714991, now seen corresponding path program 1 times [2022-11-16 12:06:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:09,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433638625] [2022-11-16 12:06:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:09,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:09,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:09,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433638625] [2022-11-16 12:06:09,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433638625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:09,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:09,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:06:09,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371330281] [2022-11-16 12:06:09,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:09,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:09,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:09,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:09,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:09,952 INFO L87 Difference]: Start difference. First operand 498 states and 1324 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:10,049 INFO L93 Difference]: Finished difference Result 540 states and 1432 transitions. [2022-11-16 12:06:10,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 12:06:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:10,053 INFO L225 Difference]: With dead ends: 540 [2022-11-16 12:06:10,053 INFO L226 Difference]: Without dead ends: 540 [2022-11-16 12:06:10,053 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 [2022-11-16 12:06:10,054 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:10,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 3 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-16 12:06:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-11-16 12:06:10,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 528 states have (on average 2.712121212121212) internal successors, (1432), 539 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1432 transitions. [2022-11-16 12:06:10,071 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1432 transitions. Word has length 10 [2022-11-16 12:06:10,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:10,071 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 1432 transitions. [2022-11-16 12:06:10,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,071 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1432 transitions. [2022-11-16 12:06:10,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:10,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:10,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:06:10,073 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1163706757, now seen corresponding path program 1 times [2022-11-16 12:06:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:10,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989806230] [2022-11-16 12:06:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989806230] [2022-11-16 12:06:10,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989806230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725224570] [2022-11-16 12:06:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:10,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:10,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:10,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:06:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:10,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:10,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:10,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:10,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725224570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:10,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:10,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 12:06:10,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765205461] [2022-11-16 12:06:10,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:10,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:06:10,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:10,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:06:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:10,419 INFO L87 Difference]: Start difference. First operand 540 states and 1432 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:10,965 INFO L93 Difference]: Finished difference Result 1256 states and 3206 transitions. [2022-11-16 12:06:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:06:10,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:10,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:10,973 INFO L225 Difference]: With dead ends: 1256 [2022-11-16 12:06:10,973 INFO L226 Difference]: Without dead ends: 1256 [2022-11-16 12:06:10,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:06:10,974 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 182 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:10,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 0 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:06:10,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-11-16 12:06:10,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 824. [2022-11-16 12:06:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 812 states have (on average 2.7610837438423643) internal successors, (2242), 823 states have internal predecessors, (2242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 2242 transitions. [2022-11-16 12:06:11,006 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 2242 transitions. Word has length 13 [2022-11-16 12:06:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:11,006 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 2242 transitions. [2022-11-16 12:06:11,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 2242 transitions. [2022-11-16 12:06:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:11,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:11,008 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:11,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:11,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1163705456, now seen corresponding path program 1 times [2022-11-16 12:06:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:11,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366473832] [2022-11-16 12:06:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:11,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366473832] [2022-11-16 12:06:11,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366473832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:11,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952014686] [2022-11-16 12:06:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:11,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:11,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:11,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:11,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:06:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:11,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 12:06:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:11,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:11,986 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:06:11,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-16 12:06:12,018 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:06:12,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 12:06:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:12,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:12,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952014686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:12,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:12,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-16 12:06:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879664629] [2022-11-16 12:06:12,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:12,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:06:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:12,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:06:12,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:06:12,431 INFO L87 Difference]: Start difference. First operand 824 states and 2242 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:13,404 INFO L93 Difference]: Finished difference Result 1500 states and 3934 transitions. [2022-11-16 12:06:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:06:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:13,413 INFO L225 Difference]: With dead ends: 1500 [2022-11-16 12:06:13,413 INFO L226 Difference]: Without dead ends: 1500 [2022-11-16 12:06:13,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:06:13,414 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 251 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:13,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 2 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:06:13,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-11-16 12:06:13,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1150. [2022-11-16 12:06:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1138 states have (on average 2.7381370826010545) internal successors, (3116), 1149 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 3116 transitions. [2022-11-16 12:06:13,459 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 3116 transitions. Word has length 13 [2022-11-16 12:06:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:13,460 INFO L495 AbstractCegarLoop]: Abstraction has 1150 states and 3116 transitions. [2022-11-16 12:06:13,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 3116 transitions. [2022-11-16 12:06:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 12:06:13,463 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:13,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 12:06:13,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:13,678 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:13,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:13,679 INFO L85 PathProgramCache]: Analyzing trace with hash 380785690, now seen corresponding path program 1 times [2022-11-16 12:06:13,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:13,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107975104] [2022-11-16 12:06:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:13,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:13,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107975104] [2022-11-16 12:06:13,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107975104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:13,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:13,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:13,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614813697] [2022-11-16 12:06:13,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:13,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:13,726 INFO L87 Difference]: Start difference. First operand 1150 states and 3116 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:13,827 INFO L93 Difference]: Finished difference Result 1180 states and 3189 transitions. [2022-11-16 12:06:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:13,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 12:06:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:13,834 INFO L225 Difference]: With dead ends: 1180 [2022-11-16 12:06:13,834 INFO L226 Difference]: Without dead ends: 1180 [2022-11-16 12:06:13,835 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 [2022-11-16 12:06:13,836 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:13,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-11-16 12:06:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1144. [2022-11-16 12:06:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 1132 states have (on average 2.7340989399293285) internal successors, (3095), 1143 states have internal predecessors, (3095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3095 transitions. [2022-11-16 12:06:13,874 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3095 transitions. Word has length 13 [2022-11-16 12:06:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:13,875 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 3095 transitions. [2022-11-16 12:06:13,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:13,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3095 transitions. [2022-11-16 12:06:13,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:06:13,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:13,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:06:13,877 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1532776258, now seen corresponding path program 1 times [2022-11-16 12:06:13,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275125097] [2022-11-16 12:06:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:13,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:13,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:13,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275125097] [2022-11-16 12:06:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275125097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:13,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:13,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:13,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599160371] [2022-11-16 12:06:13,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:13,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:13,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:13,975 INFO L87 Difference]: Start difference. First operand 1144 states and 3095 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:14,053 INFO L93 Difference]: Finished difference Result 470 states and 1082 transitions. [2022-11-16 12:06:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:14,054 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:06:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:14,056 INFO L225 Difference]: With dead ends: 470 [2022-11-16 12:06:14,056 INFO L226 Difference]: Without dead ends: 470 [2022-11-16 12:06:14,057 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 [2022-11-16 12:06:14,057 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:14,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-16 12:06:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 440. [2022-11-16 12:06:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 2.315668202764977) internal successors, (1005), 439 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1005 transitions. [2022-11-16 12:06:14,090 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1005 transitions. Word has length 18 [2022-11-16 12:06:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:14,090 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1005 transitions. [2022-11-16 12:06:14,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1005 transitions. [2022-11-16 12:06:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:06:14,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:14,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:14,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:06:14,092 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash 375039028, now seen corresponding path program 1 times [2022-11-16 12:06:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:14,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064465320] [2022-11-16 12:06:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:14,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:14,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064465320] [2022-11-16 12:06:14,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064465320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:14,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:14,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:06:14,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627005041] [2022-11-16 12:06:14,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:14,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:06:14,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:14,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:06:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:06:14,510 INFO L87 Difference]: Start difference. First operand 440 states and 1005 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:15,452 INFO L93 Difference]: Finished difference Result 630 states and 1409 transitions. [2022-11-16 12:06:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:06:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:06:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:15,456 INFO L225 Difference]: With dead ends: 630 [2022-11-16 12:06:15,456 INFO L226 Difference]: Without dead ends: 630 [2022-11-16 12:06:15,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:06:15,457 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:15,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:06:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-11-16 12:06:15,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 504. [2022-11-16 12:06:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 2.355421686746988) internal successors, (1173), 503 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1173 transitions. [2022-11-16 12:06:15,474 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1173 transitions. Word has length 19 [2022-11-16 12:06:15,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:15,474 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 1173 transitions. [2022-11-16 12:06:15,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 11 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,475 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1173 transitions. [2022-11-16 12:06:15,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:06:15,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:15,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:15,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:06:15,476 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:15,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:15,477 INFO L85 PathProgramCache]: Analyzing trace with hash 375039029, now seen corresponding path program 1 times [2022-11-16 12:06:15,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:15,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114643069] [2022-11-16 12:06:15,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:15,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:15,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114643069] [2022-11-16 12:06:15,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114643069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:15,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:15,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:06:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797181447] [2022-11-16 12:06:15,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:15,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:06:15,615 INFO L87 Difference]: Start difference. First operand 504 states and 1173 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:15,787 INFO L93 Difference]: Finished difference Result 655 states and 1526 transitions. [2022-11-16 12:06:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:06:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:06:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:15,791 INFO L225 Difference]: With dead ends: 655 [2022-11-16 12:06:15,791 INFO L226 Difference]: Without dead ends: 655 [2022-11-16 12:06:15,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:15,794 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:15,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 8 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-16 12:06:15,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 498. [2022-11-16 12:06:15,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 2.342799188640974) internal successors, (1155), 497 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1155 transitions. [2022-11-16 12:06:15,809 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1155 transitions. Word has length 19 [2022-11-16 12:06:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:15,811 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1155 transitions. [2022-11-16 12:06:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1155 transitions. [2022-11-16 12:06:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:06:15,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:15,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:06:15,813 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash 502478507, now seen corresponding path program 1 times [2022-11-16 12:06:15,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:15,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677667417] [2022-11-16 12:06:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677667417] [2022-11-16 12:06:15,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677667417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:15,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367519732] [2022-11-16 12:06:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:15,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:15,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:06:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 12:06:16,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:16,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367519732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:16,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:16,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-16 12:06:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35112513] [2022-11-16 12:06:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:16,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:16,063 INFO L87 Difference]: Start difference. First operand 498 states and 1155 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:16,152 INFO L93 Difference]: Finished difference Result 686 states and 1553 transitions. [2022-11-16 12:06:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 12:06:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:16,155 INFO L225 Difference]: With dead ends: 686 [2022-11-16 12:06:16,156 INFO L226 Difference]: Without dead ends: 686 [2022-11-16 12:06:16,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:06:16,157 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:16,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 2 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-11-16 12:06:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 562. [2022-11-16 12:06:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 555 states have (on average 2.2900900900900902) internal successors, (1271), 561 states have internal predecessors, (1271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1271 transitions. [2022-11-16 12:06:16,174 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1271 transitions. Word has length 20 [2022-11-16 12:06:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:16,175 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 1271 transitions. [2022-11-16 12:06:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1271 transitions. [2022-11-16 12:06:16,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:06:16,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:16,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:16,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 12:06:16,382 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash -364849886, now seen corresponding path program 1 times [2022-11-16 12:06:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:16,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419498689] [2022-11-16 12:06:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:17,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419498689] [2022-11-16 12:06:17,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419498689] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:17,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:17,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:06:17,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46566747] [2022-11-16 12:06:17,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:17,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:06:17,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:17,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:06:17,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:06:17,455 INFO L87 Difference]: Start difference. First operand 562 states and 1271 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:18,754 INFO L93 Difference]: Finished difference Result 628 states and 1395 transitions. [2022-11-16 12:06:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:06:18,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 12:06:18,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:18,757 INFO L225 Difference]: With dead ends: 628 [2022-11-16 12:06:18,757 INFO L226 Difference]: Without dead ends: 628 [2022-11-16 12:06:18,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:06:18,758 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:18,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 12:06:18,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-16 12:06:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 562. [2022-11-16 12:06:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 555 states have (on average 2.279279279279279) internal successors, (1265), 561 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1265 transitions. [2022-11-16 12:06:18,775 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1265 transitions. Word has length 21 [2022-11-16 12:06:18,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:18,776 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 1265 transitions. [2022-11-16 12:06:18,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,778 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1265 transitions. [2022-11-16 12:06:18,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 12:06:18,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:18,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:06:18,781 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:18,782 INFO L85 PathProgramCache]: Analyzing trace with hash -608563237, now seen corresponding path program 1 times [2022-11-16 12:06:18,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:18,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829021469] [2022-11-16 12:06:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:18,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:18,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:18,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829021469] [2022-11-16 12:06:18,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829021469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:18,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932737834] [2022-11-16 12:06:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:18,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:18,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:18,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:18,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:06:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:18,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:06:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932737834] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:19,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:19,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 12:06:19,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094070501] [2022-11-16 12:06:19,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:19,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:06:19,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:19,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:06:19,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:06:19,028 INFO L87 Difference]: Start difference. First operand 562 states and 1265 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:19,235 INFO L93 Difference]: Finished difference Result 1352 states and 2925 transitions. [2022-11-16 12:06:19,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:19,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 12:06:19,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:19,242 INFO L225 Difference]: With dead ends: 1352 [2022-11-16 12:06:19,242 INFO L226 Difference]: Without dead ends: 1352 [2022-11-16 12:06:19,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:06:19,243 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 231 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:19,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 5 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:06:19,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-11-16 12:06:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1304. [2022-11-16 12:06:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1297 states have (on average 2.222821896684657) internal successors, (2883), 1303 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 2883 transitions. [2022-11-16 12:06:19,286 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 2883 transitions. Word has length 23 [2022-11-16 12:06:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:19,286 INFO L495 AbstractCegarLoop]: Abstraction has 1304 states and 2883 transitions. [2022-11-16 12:06:19,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 2883 transitions. [2022-11-16 12:06:19,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:06:19,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:19,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:19,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:19,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:06:19,501 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:19,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1578133450, now seen corresponding path program 1 times [2022-11-16 12:06:19,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:19,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754015895] [2022-11-16 12:06:19,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 12:06:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754015895] [2022-11-16 12:06:19,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754015895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:19,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:06:19,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:06:19,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262903097] [2022-11-16 12:06:19,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:06:19,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:19,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:06:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:06:19,565 INFO L87 Difference]: Start difference. First operand 1304 states and 2883 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:19,662 INFO L93 Difference]: Finished difference Result 1442 states and 3116 transitions. [2022-11-16 12:06:19,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:06:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 12:06:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:19,670 INFO L225 Difference]: With dead ends: 1442 [2022-11-16 12:06:19,670 INFO L226 Difference]: Without dead ends: 1442 [2022-11-16 12:06:19,671 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 [2022-11-16 12:06:19,671 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:19,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:06:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2022-11-16 12:06:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1210. [2022-11-16 12:06:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1203 states have (on average 2.14713216957606) internal successors, (2583), 1209 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 2583 transitions. [2022-11-16 12:06:19,709 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 2583 transitions. Word has length 24 [2022-11-16 12:06:19,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:19,709 INFO L495 AbstractCegarLoop]: Abstraction has 1210 states and 2583 transitions. [2022-11-16 12:06:19,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:19,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 2583 transitions. [2022-11-16 12:06:19,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:06:19,713 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:19,714 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:19,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:06:19,714 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:19,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:19,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1320959317, now seen corresponding path program 1 times [2022-11-16 12:06:19,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:19,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583745728] [2022-11-16 12:06:19,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583745728] [2022-11-16 12:06:19,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583745728] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800121998] [2022-11-16 12:06:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:19,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:19,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:19,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:06:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:06:20,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:06:20,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:20,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800121998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:20,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:20,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-16 12:06:20,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319513803] [2022-11-16 12:06:20,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:20,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:06:20,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:20,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:06:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:06:20,048 INFO L87 Difference]: Start difference. First operand 1210 states and 2583 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:20,250 INFO L93 Difference]: Finished difference Result 1552 states and 3298 transitions. [2022-11-16 12:06:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:06:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 12:06:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:20,268 INFO L225 Difference]: With dead ends: 1552 [2022-11-16 12:06:20,268 INFO L226 Difference]: Without dead ends: 1552 [2022-11-16 12:06:20,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:06:20,269 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 0 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:06:20,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2022-11-16 12:06:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1416. [2022-11-16 12:06:20,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1416 states, 1409 states have (on average 2.1809794180269693) internal successors, (3073), 1415 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 3073 transitions. [2022-11-16 12:06:20,318 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 3073 transitions. Word has length 24 [2022-11-16 12:06:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:20,319 INFO L495 AbstractCegarLoop]: Abstraction has 1416 states and 3073 transitions. [2022-11-16 12:06:20,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 3073 transitions. [2022-11-16 12:06:20,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 12:06:20,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:20,322 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:20,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:20,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:20,527 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1320958016, now seen corresponding path program 1 times [2022-11-16 12:06:20,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202001150] [2022-11-16 12:06:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:20,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:20,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202001150] [2022-11-16 12:06:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202001150] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:20,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845018186] [2022-11-16 12:06:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:20,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:20,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:06:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 12:06:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:21,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:21,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:06:21,758 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 36 treesize of output 40 [2022-11-16 12:06:21,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:21,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845018186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:21,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:21,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2022-11-16 12:06:21,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283790658] [2022-11-16 12:06:21,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:21,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 12:06:21,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:21,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 12:06:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:06:21,902 INFO L87 Difference]: Start difference. First operand 1416 states and 3073 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:26,656 INFO L93 Difference]: Finished difference Result 2554 states and 5440 transitions. [2022-11-16 12:06:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:06:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 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 [2022-11-16 12:06:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:26,668 INFO L225 Difference]: With dead ends: 2554 [2022-11-16 12:06:26,669 INFO L226 Difference]: Without dead ends: 2554 [2022-11-16 12:06:26,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=900, Invalid=2882, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:06:26,671 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 515 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:26,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 0 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 12:06:26,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2022-11-16 12:06:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1454. [2022-11-16 12:06:26,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1448 states have (on average 2.173342541436464) internal successors, (3147), 1453 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 3147 transitions. [2022-11-16 12:06:26,745 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 3147 transitions. Word has length 24 [2022-11-16 12:06:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 3147 transitions. [2022-11-16 12:06:26,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 3147 transitions. [2022-11-16 12:06:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:06:26,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:26,748 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 12:06:26,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:26,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:26,953 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:26,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1032121445, now seen corresponding path program 2 times [2022-11-16 12:06:26,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:26,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956907145] [2022-11-16 12:06:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:26,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:27,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956907145] [2022-11-16 12:06:27,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956907145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:27,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711425755] [2022-11-16 12:06:27,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:27,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:27,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:27,277 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:27,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:06:27,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:27,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:06:27,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:27,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711425755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:27,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:27,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2022-11-16 12:06:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906574666] [2022-11-16 12:06:27,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 12:06:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 12:06:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:06:27,645 INFO L87 Difference]: Start difference. First operand 1454 states and 3147 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:28,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:28,404 INFO L93 Difference]: Finished difference Result 2826 states and 5978 transitions. [2022-11-16 12:06:28,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:06:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2022-11-16 12:06:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:28,425 INFO L225 Difference]: With dead ends: 2826 [2022-11-16 12:06:28,425 INFO L226 Difference]: Without dead ends: 2826 [2022-11-16 12:06:28,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:06:28,430 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 282 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:28,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 0 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:06:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2022-11-16 12:06:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 1906. [2022-11-16 12:06:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1900 states have (on average 2.171578947368421) internal successors, (4126), 1905 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:28,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 4126 transitions. [2022-11-16 12:06:28,517 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 4126 transitions. Word has length 27 [2022-11-16 12:06:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:28,519 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 4126 transitions. [2022-11-16 12:06:28,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 4126 transitions. [2022-11-16 12:06:28,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:06:28,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:28,522 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-16 12:06:28,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:28,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:28,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1032120144, now seen corresponding path program 2 times [2022-11-16 12:06:28,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210421448] [2022-11-16 12:06:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:28,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210421448] [2022-11-16 12:06:30,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210421448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154012996] [2022-11-16 12:06:30,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:30,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:30,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:30,106 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:06:30,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:30,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:30,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:06:30,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:30,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:30,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:06:30,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 12:06:30,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:30,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:31,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154012996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:31,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:31,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 32 [2022-11-16 12:06:31,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674024822] [2022-11-16 12:06:31,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:31,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:06:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:31,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:06:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:31,381 INFO L87 Difference]: Start difference. First operand 1906 states and 4126 transitions. Second operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:34,324 INFO L93 Difference]: Finished difference Result 3616 states and 7539 transitions. [2022-11-16 12:06:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:06:34,325 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 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 [2022-11-16 12:06:34,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:34,338 INFO L225 Difference]: With dead ends: 3616 [2022-11-16 12:06:34,338 INFO L226 Difference]: Without dead ends: 3616 [2022-11-16 12:06:34,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=387, Invalid=2265, Unknown=0, NotChecked=0, Total=2652 [2022-11-16 12:06:34,340 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 551 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2502 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:34,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 0 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2502 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 12:06:34,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-11-16 12:06:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 2508. [2022-11-16 12:06:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2502 states have (on average 2.1454836131095125) internal successors, (5368), 2507 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 5368 transitions. [2022-11-16 12:06:34,425 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 5368 transitions. Word has length 27 [2022-11-16 12:06:34,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:34,426 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 5368 transitions. [2022-11-16 12:06:34,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:34,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 5368 transitions. [2022-11-16 12:06:34,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 12:06:34,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:34,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:34,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:34,636 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:34,636 INFO L85 PathProgramCache]: Analyzing trace with hash 373462707, now seen corresponding path program 2 times [2022-11-16 12:06:34,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:34,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422723324] [2022-11-16 12:06:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:34,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:35,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:35,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422723324] [2022-11-16 12:06:35,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422723324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:35,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102791382] [2022-11-16 12:06:35,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:35,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:35,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:35,981 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:35,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:06:36,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:06:36,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:36,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:06:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:36,191 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:06:36,192 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 15 treesize of output 15 [2022-11-16 12:06:36,669 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 22 treesize of output 17 [2022-11-16 12:06:36,995 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 63 treesize of output 58 [2022-11-16 12:06:37,632 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 111 treesize of output 46 [2022-11-16 12:06:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:06:46,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:06:46,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102791382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:06:46,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:06:46,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 30 [2022-11-16 12:06:46,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023243601] [2022-11-16 12:06:46,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:06:46,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:06:46,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:46,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:06:46,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=918, Unknown=2, NotChecked=0, Total=992 [2022-11-16 12:06:46,944 INFO L87 Difference]: Start difference. First operand 2508 states and 5368 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:53,865 INFO L93 Difference]: Finished difference Result 3448 states and 7389 transitions. [2022-11-16 12:06:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:06:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 12:06:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:53,877 INFO L225 Difference]: With dead ends: 3448 [2022-11-16 12:06:53,878 INFO L226 Difference]: Without dead ends: 3448 [2022-11-16 12:06:53,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=220, Invalid=1940, Unknown=2, NotChecked=0, Total=2162 [2022-11-16 12:06:53,879 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 202 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:53,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 760 Invalid, 0 Unknown, 71 Unchecked, 1.7s Time] [2022-11-16 12:06:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2022-11-16 12:06:53,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3205. [2022-11-16 12:06:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 3199 states have (on average 2.1738043138480774) internal successors, (6954), 3204 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 6954 transitions. [2022-11-16 12:06:53,972 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 6954 transitions. Word has length 28 [2022-11-16 12:06:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:53,973 INFO L495 AbstractCegarLoop]: Abstraction has 3205 states and 6954 transitions. [2022-11-16 12:06:53,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 6954 transitions. [2022-11-16 12:06:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:06:53,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:53,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:53,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:54,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:06:54,182 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:54,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:54,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1307558012, now seen corresponding path program 1 times [2022-11-16 12:06:54,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:54,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710629205] [2022-11-16 12:06:54,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:54,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:54,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:54,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:54,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710629205] [2022-11-16 12:06:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710629205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:54,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813393412] [2022-11-16 12:06:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:54,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:54,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:54,352 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:54,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:06:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:54,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:06:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:54,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:54,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:54,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813393412] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:54,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:54,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-16 12:06:54,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2978617] [2022-11-16 12:06:54,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:54,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:06:54,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:06:54,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:54,718 INFO L87 Difference]: Start difference. First operand 3205 states and 6954 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:06:55,189 INFO L93 Difference]: Finished difference Result 5081 states and 10325 transitions. [2022-11-16 12:06:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:06:55,190 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 12:06:55,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:06:55,207 INFO L225 Difference]: With dead ends: 5081 [2022-11-16 12:06:55,208 INFO L226 Difference]: Without dead ends: 5081 [2022-11-16 12:06:55,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:06:55,209 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 197 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:06:55,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 10 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:06:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2022-11-16 12:06:55,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 5039. [2022-11-16 12:06:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5039 states, 5032 states have (on average 2.0453100158982513) internal successors, (10292), 5038 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5039 states to 5039 states and 10292 transitions. [2022-11-16 12:06:55,341 INFO L78 Accepts]: Start accepts. Automaton has 5039 states and 10292 transitions. Word has length 29 [2022-11-16 12:06:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:06:55,343 INFO L495 AbstractCegarLoop]: Abstraction has 5039 states and 10292 transitions. [2022-11-16 12:06:55,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:55,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5039 states and 10292 transitions. [2022-11-16 12:06:55,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:06:55,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:06:55,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:55,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:55,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-16 12:06:55,552 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:06:55,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:55,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1307558384, now seen corresponding path program 1 times [2022-11-16 12:06:55,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:55,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661162953] [2022-11-16 12:06:55,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:55,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:57,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661162953] [2022-11-16 12:06:57,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661162953] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:57,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381635762] [2022-11-16 12:06:57,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:57,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:57,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:57,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:57,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:06:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:57,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 12:06:57,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:57,655 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:06:57,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 12:06:58,465 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 22 treesize of output 17 [2022-11-16 12:06:58,956 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 51 treesize of output 46 [2022-11-16 12:06:59,852 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 79 treesize of output 46 [2022-11-16 12:07:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:10,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:11,097 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_832 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_832) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-16 12:07:13,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:13,177 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 29 treesize of output 30 [2022-11-16 12:07:13,193 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:13,194 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 49 treesize of output 52 [2022-11-16 12:07:13,207 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 28 treesize of output 22 [2022-11-16 12:07:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 12:07:13,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381635762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:13,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:13,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2022-11-16 12:07:13,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835459941] [2022-11-16 12:07:13,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:13,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-16 12:07:13,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:13,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-16 12:07:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1993, Unknown=16, NotChecked=90, Total=2256 [2022-11-16 12:07:13,734 INFO L87 Difference]: Start difference. First operand 5039 states and 10292 transitions. Second operand has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:34,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:07:34,410 INFO L93 Difference]: Finished difference Result 14427 states and 28151 transitions. [2022-11-16 12:07:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-16 12:07:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 12:07:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:07:34,461 INFO L225 Difference]: With dead ends: 14427 [2022-11-16 12:07:34,462 INFO L226 Difference]: Without dead ends: 14427 [2022-11-16 12:07:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5310 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=1395, Invalid=16672, Unknown=27, NotChecked=266, Total=18360 [2022-11-16 12:07:34,467 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 400 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5245 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 6277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1013 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:07:34,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 7 Invalid, 6277 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 5245 Invalid, 0 Unknown, 1013 Unchecked, 6.8s Time] [2022-11-16 12:07:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14427 states. [2022-11-16 12:07:34,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14427 to 9013. [2022-11-16 12:07:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9013 states, 9006 states have (on average 2.0954918942926937) internal successors, (18872), 9012 states have internal predecessors, (18872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 18872 transitions. [2022-11-16 12:07:34,828 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 18872 transitions. Word has length 29 [2022-11-16 12:07:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:07:34,829 INFO L495 AbstractCegarLoop]: Abstraction has 9013 states and 18872 transitions. [2022-11-16 12:07:34,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.851063829787234) internal successors, (87), 47 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 18872 transitions. [2022-11-16 12:07:34,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:07:34,831 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:07:34,831 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:34,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:35,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 12:07:35,039 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:07:35,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:35,040 INFO L85 PathProgramCache]: Analyzing trace with hash 633333322, now seen corresponding path program 2 times [2022-11-16 12:07:35,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:35,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758260032] [2022-11-16 12:07:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:35,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:37,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758260032] [2022-11-16 12:07:37,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758260032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:37,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080869839] [2022-11-16 12:07:37,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:07:37,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:37,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:37,073 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:37,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:07:37,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:07:37,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:37,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-16 12:07:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:37,336 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:07:37,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 12:07:37,933 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 22 treesize of output 17 [2022-11-16 12:07:38,211 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 59 treesize of output 54 [2022-11-16 12:07:39,268 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 111 treesize of output 46 [2022-11-16 12:07:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:07:51,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:52,301 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_892 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_892) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-16 12:07:52,314 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:52,314 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 29 treesize of output 30 [2022-11-16 12:07:52,332 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:07:52,333 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 49 treesize of output 52 [2022-11-16 12:07:52,339 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 28 treesize of output 22 [2022-11-16 12:07:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-16 12:07:52,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080869839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:52,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:52,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 45 [2022-11-16 12:07:52,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345927820] [2022-11-16 12:07:52,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:52,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 12:07:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:52,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 12:07:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1922, Unknown=12, NotChecked=88, Total=2162 [2022-11-16 12:07:52,859 INFO L87 Difference]: Start difference. First operand 9013 states and 18872 transitions. Second operand has 47 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:08:18,925 INFO L93 Difference]: Finished difference Result 10413 states and 21395 transitions. [2022-11-16 12:08:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-16 12:08:18,926 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 12:08:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:08:18,955 INFO L225 Difference]: With dead ends: 10413 [2022-11-16 12:08:18,955 INFO L226 Difference]: Without dead ends: 10413 [2022-11-16 12:08:18,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=1056, Invalid=8637, Unknown=13, NotChecked=194, Total=9900 [2022-11-16 12:08:18,959 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 673 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 3799 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 4436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:08:18,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [673 Valid, 2 Invalid, 4436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3799 Invalid, 0 Unknown, 594 Unchecked, 5.4s Time] [2022-11-16 12:08:18,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10413 states. [2022-11-16 12:08:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10413 to 9237. [2022-11-16 12:08:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9237 states, 9230 states have (on average 2.101516793066089) internal successors, (19397), 9236 states have internal predecessors, (19397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9237 states to 9237 states and 19397 transitions. [2022-11-16 12:08:19,239 INFO L78 Accepts]: Start accepts. Automaton has 9237 states and 19397 transitions. Word has length 29 [2022-11-16 12:08:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:08:19,240 INFO L495 AbstractCegarLoop]: Abstraction has 9237 states and 19397 transitions. [2022-11-16 12:08:19,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:08:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 9237 states and 19397 transitions. [2022-11-16 12:08:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 12:08:19,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:08:19,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:08:19,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:08:19,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:08:19,452 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:08:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:08:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1438644532, now seen corresponding path program 3 times [2022-11-16 12:08:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:08:19,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699147846] [2022-11-16 12:08:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:08:19,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:08:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:08:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:08:23,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:08:23,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699147846] [2022-11-16 12:08:23,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699147846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:08:23,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453613905] [2022-11-16 12:08:23,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:08:23,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:08:23,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:08:23,042 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:08:23,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:08:23,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-16 12:08:23,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:08:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 12:08:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:08:23,244 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:08:23,244 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 15 treesize of output 15 [2022-11-16 12:08:23,811 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 22 treesize of output 17 [2022-11-16 12:08:23,956 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 59 treesize of output 54 [2022-11-16 12:08:25,032 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 111 treesize of output 46 [2022-11-16 12:08:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:08:44,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:08:45,582 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_953 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_953) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2022-11-16 12:08:45,592 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:45,592 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 29 treesize of output 30 [2022-11-16 12:08:45,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:08:45,608 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 49 treesize of output 52 [2022-11-16 12:08:45,614 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 28 treesize of output 22 [2022-11-16 12:08:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:08:46,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453613905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:08:46,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:08:46,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 47 [2022-11-16 12:08:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143111419] [2022-11-16 12:08:46,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:08:46,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-16 12:08:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:08:46,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-16 12:08:46,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2091, Unknown=3, NotChecked=92, Total=2352 [2022-11-16 12:08:46,161 INFO L87 Difference]: Start difference. First operand 9237 states and 19397 transitions. Second operand has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:18,967 INFO L93 Difference]: Finished difference Result 9749 states and 20185 transitions. [2022-11-16 12:09:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:09:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-11-16 12:09:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:18,988 INFO L225 Difference]: With dead ends: 9749 [2022-11-16 12:09:18,988 INFO L226 Difference]: Without dead ends: 9749 [2022-11-16 12:09:18,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=1018, Invalid=5955, Unknown=3, NotChecked=164, Total=7140 [2022-11-16 12:09:18,991 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1040 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:18,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 5 Invalid, 2753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2355 Invalid, 0 Unknown, 286 Unchecked, 5.0s Time] [2022-11-16 12:09:19,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9749 states. [2022-11-16 12:09:19,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9749 to 9160. [2022-11-16 12:09:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9160 states, 9153 states have (on average 2.09985797006446) internal successors, (19220), 9159 states have internal predecessors, (19220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:19,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9160 states to 9160 states and 19220 transitions. [2022-11-16 12:09:19,192 INFO L78 Accepts]: Start accepts. Automaton has 9160 states and 19220 transitions. Word has length 29 [2022-11-16 12:09:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 9160 states and 19220 transitions. [2022-11-16 12:09:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.8125) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:19,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9160 states and 19220 transitions. [2022-11-16 12:09:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:09:19,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:19,197 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:19,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:19,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 12:09:19,403 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:09:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:19,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1249949730, now seen corresponding path program 2 times [2022-11-16 12:09:19,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:19,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131956944] [2022-11-16 12:09:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:19,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:09:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131956944] [2022-11-16 12:09:19,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131956944] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:19,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405805438] [2022-11-16 12:09:19,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:19,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:19,625 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:19,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:09:19,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:09:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:19,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:09:19,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:09:19,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:09:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405805438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:20,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:20,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-11-16 12:09:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285103872] [2022-11-16 12:09:20,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:20,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:09:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:09:20,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:09:20,064 INFO L87 Difference]: Start difference. First operand 9160 states and 19220 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:20,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:20,704 INFO L93 Difference]: Finished difference Result 11189 states and 23067 transitions. [2022-11-16 12:09:20,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:09:20,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 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 31 [2022-11-16 12:09:20,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:20,721 INFO L225 Difference]: With dead ends: 11189 [2022-11-16 12:09:20,721 INFO L226 Difference]: Without dead ends: 11189 [2022-11-16 12:09:20,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-11-16 12:09:20,722 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:20,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 12:09:20,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11189 states. [2022-11-16 12:09:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11189 to 10013. [2022-11-16 12:09:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10013 states, 10006 states have (on average 2.080051968818709) internal successors, (20813), 10012 states have internal predecessors, (20813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10013 states to 10013 states and 20813 transitions. [2022-11-16 12:09:20,951 INFO L78 Accepts]: Start accepts. Automaton has 10013 states and 20813 transitions. Word has length 31 [2022-11-16 12:09:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:20,951 INFO L495 AbstractCegarLoop]: Abstraction has 10013 states and 20813 transitions. [2022-11-16 12:09:20,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 10013 states and 20813 transitions. [2022-11-16 12:09:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:09:20,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:20,954 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:20,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:21,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:21,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:09:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:21,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1642215729, now seen corresponding path program 2 times [2022-11-16 12:09:21,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:21,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648001132] [2022-11-16 12:09:21,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:21,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:22,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648001132] [2022-11-16 12:09:22,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648001132] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606428509] [2022-11-16 12:09:22,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:09:22,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:22,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:22,045 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:22,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:09:22,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:09:22,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:09:22,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 12:09:22,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:22,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:22,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:22,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-16 12:09:22,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:22,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:09:23,636 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:23,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606428509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:09:23,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:09:23,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 31 [2022-11-16 12:09:23,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159263417] [2022-11-16 12:09:23,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:09:23,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:09:23,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:09:23,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:09:23,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:09:23,639 INFO L87 Difference]: Start difference. First operand 10013 states and 20813 transitions. Second operand has 33 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:09:27,129 INFO L93 Difference]: Finished difference Result 14314 states and 29436 transitions. [2022-11-16 12:09:27,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 12:09:27,130 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 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 31 [2022-11-16 12:09:27,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:09:27,152 INFO L225 Difference]: With dead ends: 14314 [2022-11-16 12:09:27,153 INFO L226 Difference]: Without dead ends: 14314 [2022-11-16 12:09:27,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 12:09:27,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 506 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:09:27,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 0 Invalid, 2518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 12:09:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14314 states. [2022-11-16 12:09:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14314 to 12775. [2022-11-16 12:09:27,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12775 states, 12768 states have (on average 2.0834116541353382) internal successors, (26601), 12774 states have internal predecessors, (26601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12775 states to 12775 states and 26601 transitions. [2022-11-16 12:09:27,469 INFO L78 Accepts]: Start accepts. Automaton has 12775 states and 26601 transitions. Word has length 31 [2022-11-16 12:09:27,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:09:27,470 INFO L495 AbstractCegarLoop]: Abstraction has 12775 states and 26601 transitions. [2022-11-16 12:09:27,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.90625) internal successors, (93), 32 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:09:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12775 states and 26601 transitions. [2022-11-16 12:09:27,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:09:27,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:09:27,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:09:27,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:09:27,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:27,681 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:09:27,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:09:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1880221706, now seen corresponding path program 1 times [2022-11-16 12:09:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:09:27,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055507072] [2022-11-16 12:09:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:09:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:09:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:09:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055507072] [2022-11-16 12:09:32,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055507072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:09:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142772544] [2022-11-16 12:09:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:09:32,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:09:32,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:09:32,851 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:09:32,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:09:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:09:33,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 12:09:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:09:33,299 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:09:33,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 12:09:33,882 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 22 treesize of output 17 [2022-11-16 12:09:34,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:09:34,816 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 52 treesize of output 38 [2022-11-16 12:09:35,195 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 43 treesize of output 38 [2022-11-16 12:09:36,691 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 79 treesize of output 46 [2022-11-16 12:10:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:01,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:10:06,477 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 12:10:06,478 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 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-16 12:10:06,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:10:06,499 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 67 treesize of output 70 [2022-11-16 12:10:06,508 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 28 treesize of output 22 [2022-11-16 12:10:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:10:09,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142772544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:10:09,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:10:09,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 21] total 66 [2022-11-16 12:10:09,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44553118] [2022-11-16 12:10:09,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:10:09,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-16 12:10:09,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:10:09,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-16 12:10:09,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=4162, Unknown=25, NotChecked=0, Total=4556 [2022-11-16 12:10:09,345 INFO L87 Difference]: Start difference. First operand 12775 states and 26601 transitions. Second operand has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:10:19,088 WARN L233 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 77 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:10:20,250 WARN L833 $PredicateComparison]: unable to prove that (and (or (= |c_t1Thread1of1ForFork0_inc_top_#t~post31#1| 0) (forall ((v_ArrVal_1155 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1155) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294)))) (or (= c_~top~0 0) (forall ((v_ArrVal_1155 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1155) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296)))))) is different from false [2022-11-16 12:11:18,825 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:11:51,399 WARN L233 SmtUtils]: Spent 8.23s on a formula simplification. DAG size of input: 71 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:12:11,736 WARN L233 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 87 DAG size of output: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:12:58,358 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 80 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:13:12,993 WARN L233 SmtUtils]: Spent 8.48s on a formula simplification. DAG size of input: 94 DAG size of output: 80 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:13:13,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:13:13,201 INFO L93 Difference]: Finished difference Result 20161 states and 41598 transitions. [2022-11-16 12:13:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-11-16 12:13:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-16 12:13:13,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:13:13,266 INFO L225 Difference]: With dead ends: 20161 [2022-11-16 12:13:13,266 INFO L226 Difference]: Without dead ends: 20161 [2022-11-16 12:13:13,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 37 SyntacticMatches, 17 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10018 ImplicationChecksByTransitivity, 211.6s TimeCoverageRelationStatistics Valid=2915, Invalid=26582, Unknown=263, NotChecked=342, Total=30102 [2022-11-16 12:13:13,269 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 932 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 3530 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 9188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5579 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:13:13,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 2 Invalid, 9188 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 3530 Invalid, 0 Unknown, 5579 Unchecked, 8.8s Time] [2022-11-16 12:13:13,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20161 states. [2022-11-16 12:13:13,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20161 to 15706. [2022-11-16 12:13:13,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15706 states, 15699 states have (on average 2.1086056436715714) internal successors, (33103), 15705 states have internal predecessors, (33103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15706 states to 15706 states and 33103 transitions. [2022-11-16 12:13:13,625 INFO L78 Accepts]: Start accepts. Automaton has 15706 states and 33103 transitions. Word has length 36 [2022-11-16 12:13:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:13:13,625 INFO L495 AbstractCegarLoop]: Abstraction has 15706 states and 33103 transitions. [2022-11-16 12:13:13,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.6119402985074627) internal successors, (108), 67 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:13:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15706 states and 33103 transitions. [2022-11-16 12:13:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:13:13,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:13:13,630 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:13:13,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:13:13,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 12:13:13,837 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:13:13,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:13:13,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1745261936, now seen corresponding path program 2 times [2022-11-16 12:13:13,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:13:13,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080546040] [2022-11-16 12:13:13,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:13:13,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:13:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:13:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:16,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:13:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080546040] [2022-11-16 12:13:16,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080546040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:13:16,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336383372] [2022-11-16 12:13:16,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:13:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:13:16,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:13:16,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:13:16,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:13:16,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:13:16,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:13:16,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 12:13:16,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:13:16,838 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:13:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 12:13:17,289 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 22 treesize of output 17 [2022-11-16 12:13:17,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:13:17,899 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 52 treesize of output 38 [2022-11-16 12:13:18,030 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 43 treesize of output 38 [2022-11-16 12:13:19,279 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 79 treesize of output 46 [2022-11-16 12:13:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:13:42,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:13:43,025 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1225 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|) |c_~#arr~0.offset| (- 4))) 4294967296)))) is different from false [2022-11-16 12:13:43,035 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1225 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-16 12:13:50,598 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 12:13:50,598 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 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-16 12:13:50,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:13:50,633 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 67 treesize of output 70 [2022-11-16 12:13:50,642 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 28 treesize of output 22 [2022-11-16 12:13:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 12:13:55,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336383372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:13:55,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:13:55,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 67 [2022-11-16 12:13:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839115321] [2022-11-16 12:13:55,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:13:55,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-16 12:13:55,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:13:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-16 12:13:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=4075, Unknown=27, NotChecked=262, Total=4692 [2022-11-16 12:13:55,199 INFO L87 Difference]: Start difference. First operand 15706 states and 33103 transitions. Second operand has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:15,686 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~top~0 4))) (and (forall ((|v_t1Thread1of1ForFork0_push_#t~ret34#1_172| Int) (v_ArrVal_1225 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_99| Int) (v_ArrVal_1223 Int)) (or (not (= (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_172| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_99|) v_ArrVal_1223)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse0)) 4294967296) 4294967294)) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_99| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_172| (+ c_~top~0 1)))) (forall ((v_ArrVal_1225 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) .cse0)) 4294967296) 4294967294))))) is different from false [2022-11-16 12:14:19,401 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4 |c_t1Thread1of1ForFork0_inc_top_#t~post31#1|))) (and (forall ((v_ArrVal_1225 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset| (- 4))) 4294967296)))) (forall ((|v_t1Thread1of1ForFork0_push_#t~ret34#1_172| Int) (v_ArrVal_1225 (Array Int Int)) (|v_t1Thread1of1ForFork0_push_~stack#1.offset_99| Int) (v_ArrVal_1223 Int)) (or (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork0_push_#t~ret34#1_172| 4) |v_t1Thread1of1ForFork0_push_~stack#1.offset_99|) v_ArrVal_1223)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1225) |c_~#arr~0.base|) (+ .cse0 |c_~#arr~0.offset|)) 4294967296))) (< |v_t1Thread1of1ForFork0_push_~stack#1.offset_99| |c_~#arr~0.offset|) (< |v_t1Thread1of1ForFork0_push_#t~ret34#1_172| (+ |c_t1Thread1of1ForFork0_inc_top_#t~post31#1| 1)))))) is different from false [2022-11-16 12:14:32,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:32,271 INFO L93 Difference]: Finished difference Result 23241 states and 48766 transitions. [2022-11-16 12:14:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-11-16 12:14:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-16 12:14:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:32,313 INFO L225 Difference]: With dead ends: 23241 [2022-11-16 12:14:32,314 INFO L226 Difference]: Without dead ends: 23241 [2022-11-16 12:14:32,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 163 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 8646 ImplicationChecksByTransitivity, 70.8s TimeCoverageRelationStatistics Valid=2039, Invalid=23687, Unknown=50, NotChecked=1284, Total=27060 [2022-11-16 12:14:32,317 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 783 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3290 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2164 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:32,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [783 Valid, 0 Invalid, 5516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3290 Invalid, 0 Unknown, 2164 Unchecked, 4.0s Time] [2022-11-16 12:14:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23241 states. [2022-11-16 12:14:32,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23241 to 16069. [2022-11-16 12:14:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16069 states, 16062 states have (on average 2.1016062756817333) internal successors, (33756), 16068 states have internal predecessors, (33756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16069 states to 16069 states and 33756 transitions. [2022-11-16 12:14:32,709 INFO L78 Accepts]: Start accepts. Automaton has 16069 states and 33756 transitions. Word has length 36 [2022-11-16 12:14:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:32,709 INFO L495 AbstractCegarLoop]: Abstraction has 16069 states and 33756 transitions. [2022-11-16 12:14:32,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.588235294117647) internal successors, (108), 68 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:14:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 16069 states and 33756 transitions. [2022-11-16 12:14:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:14:32,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:32,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:32,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-16 12:14:33,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:33,008 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:14:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash 821304422, now seen corresponding path program 3 times [2022-11-16 12:14:33,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:33,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434495109] [2022-11-16 12:14:33,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:38,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:38,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434495109] [2022-11-16 12:14:38,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434495109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:38,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42374756] [2022-11-16 12:14:38,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:14:38,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:38,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:38,047 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:38,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:14:38,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:14:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:38,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-16 12:14:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:38,448 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:14:38,449 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 15 treesize of output 15 [2022-11-16 12:14:39,101 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 22 treesize of output 17 [2022-11-16 12:14:40,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:14:40,002 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 52 treesize of output 38 [2022-11-16 12:14:40,045 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 43 treesize of output 38 [2022-11-16 12:14:42,062 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 79 treesize of output 46 [2022-11-16 12:15:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:16,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:25,510 INFO L321 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2022-11-16 12:15:25,511 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 2 case distinctions, treesize of input 53 treesize of output 60 [2022-11-16 12:15:25,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:25,525 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 67 treesize of output 70 [2022-11-16 12:15:25,532 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 28 treesize of output 22 [2022-11-16 12:15:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:15:30,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42374756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:30,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:30,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20, 20] total 65 [2022-11-16 12:15:30,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136341793] [2022-11-16 12:15:30,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:30,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-16 12:15:30,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:30,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-16 12:15:30,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4102, Unknown=50, NotChecked=0, Total=4422 [2022-11-16 12:15:30,219 INFO L87 Difference]: Start difference. First operand 16069 states and 33756 transitions. Second operand has 67 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:16,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:16,646 INFO L93 Difference]: Finished difference Result 24911 states and 52020 transitions. [2022-11-16 12:17:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-16 12:17:16,646 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-16 12:17:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:16,695 INFO L225 Difference]: With dead ends: 24911 [2022-11-16 12:17:16,695 INFO L226 Difference]: Without dead ends: 24911 [2022-11-16 12:17:16,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 39 SyntacticMatches, 34 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 11846 ImplicationChecksByTransitivity, 146.5s TimeCoverageRelationStatistics Valid=2367, Invalid=32287, Unknown=128, NotChecked=0, Total=34782 [2022-11-16 12:17:16,698 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2435 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:16,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 0 Invalid, 7331 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [58 Valid, 4838 Invalid, 0 Unknown, 2435 Unchecked, 12.4s Time] [2022-11-16 12:17:16,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24911 states. [2022-11-16 12:17:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24911 to 19484. [2022-11-16 12:17:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19484 states, 19477 states have (on average 2.1573650972942446) internal successors, (42019), 19483 states have internal predecessors, (42019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19484 states to 19484 states and 42019 transitions. [2022-11-16 12:17:17,123 INFO L78 Accepts]: Start accepts. Automaton has 19484 states and 42019 transitions. Word has length 36 [2022-11-16 12:17:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:17,123 INFO L495 AbstractCegarLoop]: Abstraction has 19484 states and 42019 transitions. [2022-11-16 12:17:17,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 66 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:17,124 INFO L276 IsEmpty]: Start isEmpty. Operand 19484 states and 42019 transitions. [2022-11-16 12:17:17,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:17:17,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:17,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:17,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:17,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 12:17:17,337 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:17:17,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash -763874008, now seen corresponding path program 4 times [2022-11-16 12:17:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:17,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996453494] [2022-11-16 12:17:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:18,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996453494] [2022-11-16 12:17:18,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996453494] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:18,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898331105] [2022-11-16 12:17:18,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:17:18,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:18,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:18,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:18,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:17:18,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:17:18,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:18,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 12:17:18,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:19,465 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 22 treesize of output 17 [2022-11-16 12:17:20,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:17:20,683 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 49 [2022-11-16 12:17:20,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:20,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:21,562 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 54 treesize of output 46 [2022-11-16 12:17:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:22,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898331105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:22,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:22,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 49 [2022-11-16 12:17:22,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021556037] [2022-11-16 12:17:22,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:22,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 12:17:22,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 12:17:22,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2365, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 12:17:22,375 INFO L87 Difference]: Start difference. First operand 19484 states and 42019 transitions. Second operand has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:26,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:17:26,829 INFO L93 Difference]: Finished difference Result 21270 states and 45394 transitions. [2022-11-16 12:17:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 12:17:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-16 12:17:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:17:26,869 INFO L225 Difference]: With dead ends: 21270 [2022-11-16 12:17:26,870 INFO L226 Difference]: Without dead ends: 21270 [2022-11-16 12:17:26,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=456, Invalid=4374, Unknown=0, NotChecked=0, Total=4830 [2022-11-16 12:17:26,871 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 177 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:17:26,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 0 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1945 Invalid, 0 Unknown, 704 Unchecked, 2.0s Time] [2022-11-16 12:17:26,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21270 states. [2022-11-16 12:17:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21270 to 20484. [2022-11-16 12:17:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20484 states, 20477 states have (on average 2.151438198954925) internal successors, (44055), 20483 states have internal predecessors, (44055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20484 states to 20484 states and 44055 transitions. [2022-11-16 12:17:27,253 INFO L78 Accepts]: Start accepts. Automaton has 20484 states and 44055 transitions. Word has length 36 [2022-11-16 12:17:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:17:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 20484 states and 44055 transitions. [2022-11-16 12:17:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.16) internal successors, (108), 50 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:17:27,254 INFO L276 IsEmpty]: Start isEmpty. Operand 20484 states and 44055 transitions. [2022-11-16 12:17:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:17:27,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:17:27,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:17:27,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:17:27,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:17:27,461 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:17:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:17:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 22540258, now seen corresponding path program 5 times [2022-11-16 12:17:27,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:17:27,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964981773] [2022-11-16 12:17:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:17:27,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:17:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:17:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:17:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:17:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964981773] [2022-11-16 12:17:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964981773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:17:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648610078] [2022-11-16 12:17:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:17:29,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:17:29,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:17:29,869 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:17:29,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:17:30,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:17:30,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:17:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 12:17:30,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:17:30,966 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 22 treesize of output 17 [2022-11-16 12:17:32,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:17:32,386 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 46 [2022-11-16 12:17:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:43,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:17:44,698 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 54 treesize of output 46 [2022-11-16 12:17:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 12:17:45,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648610078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:17:45,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:17:45,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 53 [2022-11-16 12:17:45,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008793622] [2022-11-16 12:17:45,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:17:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-16 12:17:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:17:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-16 12:17:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2742, Unknown=1, NotChecked=0, Total=2970 [2022-11-16 12:17:45,718 INFO L87 Difference]: Start difference. First operand 20484 states and 44055 transitions. Second operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:07,057 INFO L93 Difference]: Finished difference Result 22145 states and 46916 transitions. [2022-11-16 12:18:07,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:18:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 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 36 [2022-11-16 12:18:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:07,101 INFO L225 Difference]: With dead ends: 22145 [2022-11-16 12:18:07,101 INFO L226 Difference]: Without dead ends: 22145 [2022-11-16 12:18:07,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 46 SyntacticMatches, 14 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=1255, Invalid=10516, Unknown=1, NotChecked=0, Total=11772 [2022-11-16 12:18:07,102 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 647 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1684 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 4013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2300 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:07,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 1 Invalid, 4013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1684 Invalid, 0 Unknown, 2300 Unchecked, 2.4s Time] [2022-11-16 12:18:07,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22145 states. [2022-11-16 12:18:07,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22145 to 20986. [2022-11-16 12:18:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20986 states, 20979 states have (on average 2.147862147862148) internal successors, (45060), 20985 states have internal predecessors, (45060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 45060 transitions. [2022-11-16 12:18:07,507 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 45060 transitions. Word has length 36 [2022-11-16 12:18:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:07,507 INFO L495 AbstractCegarLoop]: Abstraction has 20986 states and 45060 transitions. [2022-11-16 12:18:07,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:18:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 45060 transitions. [2022-11-16 12:18:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 12:18:07,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:07,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:18:07,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:07,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:18:07,717 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:18:07,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:07,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1981289912, now seen corresponding path program 6 times [2022-11-16 12:18:07,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:07,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998857573] [2022-11-16 12:18:07,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:07,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:18:10,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:10,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998857573] [2022-11-16 12:18:10,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998857573] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:10,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330636436] [2022-11-16 12:18:10,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:18:10,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:10,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:10,601 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:10,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_04d432bf-c01b-4d76-8b0c-5065daf7f44a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:18:10,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:18:10,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:18:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 12:18:10,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:11,213 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 22 treesize of output 17 [2022-11-16 12:18:11,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:18:11,867 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 72 treesize of output 43 [2022-11-16 12:18:13,058 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 111 treesize of output 46 [2022-11-16 12:18:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:30,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:32,330 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 54 treesize of output 46 [2022-11-16 12:18:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:32,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330636436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:32,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:32,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 52 [2022-11-16 12:18:32,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682849437] [2022-11-16 12:18:32,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:32,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 12:18:32,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:32,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 12:18:32,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2589, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 12:18:32,728 INFO L87 Difference]: Start difference. First operand 20986 states and 45060 transitions. Second operand has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)