./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-1.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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- 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 11:50:35,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:50:35,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:50:35,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:50:35,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:50:35,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:50:35,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:50:35,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:50:35,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:50:35,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:50:35,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:50:35,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:50:35,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:50:35,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:50:35,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:50:35,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:50:35,916 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:50:35,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:50:35,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:50:35,921 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:50:35,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:50:35,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:50:35,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:50:35,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:50:35,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:50:35,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:50:35,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:50:35,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:50:35,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:50:35,950 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:50:35,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:50:35,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:50:35,954 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:50:35,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:50:35,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:50:35,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:50:35,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:50:35,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:50:35,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:50:35,962 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:50:35,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:50:35,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:50:35,988 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:50:35,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:50:35,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:50:35,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:50:35,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:50:35,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:50:36,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:50:36,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:50:36,000 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:50:36,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:50:36,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:50:36,001 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:50:36,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:50:36,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:50:36,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:50:36,002 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:50:36,002 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:50:36,005 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:50:36,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:50:36,005 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:50:36,006 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:50:36,006 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:50:36,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:50:36,006 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:50:36,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:50:36,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:50:36,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:50:36,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:50:36,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:50:36,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:50:36,011 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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-11-16 11:50:36,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:50:36,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:50:36,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:50:36,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:50:36,393 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:50:36,395 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread/stack-1.i [2022-11-16 11:50:36,483 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/data/52845225a/1f9a52aa37fd426d94dc6394e85996c3/FLAG073ce3a24 [2022-11-16 11:50:37,144 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:50:37,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/sv-benchmarks/c/pthread/stack-1.i [2022-11-16 11:50:37,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/data/52845225a/1f9a52aa37fd426d94dc6394e85996c3/FLAG073ce3a24 [2022-11-16 11:50:37,427 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/data/52845225a/1f9a52aa37fd426d94dc6394e85996c3 [2022-11-16 11:50:37,432 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:50:37,433 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:50:37,438 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:50:37,438 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:50:37,442 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:50:37,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:50:37" (1/1) ... [2022-11-16 11:50:37,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6eb0c7f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:37, skipping insertion in model container [2022-11-16 11:50:37,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:50:37" (1/1) ... [2022-11-16 11:50:37,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:50:37,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:50:38,070 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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-16 11:50:38,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:50:38,153 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:50:38,211 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_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-16 11:50:38,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:50:38,294 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:50:38,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38 WrapperNode [2022-11-16 11:50:38,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:50:38,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:50:38,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:50:38,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:50:38,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,389 INFO L138 Inliner]: procedures = 277, calls = 45, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 154 [2022-11-16 11:50:38,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:50:38,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:50:38,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:50:38,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:50:38,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,405 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,435 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:50:38,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:50:38,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:50:38,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:50:38,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (1/1) ... [2022-11-16 11:50:38,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:50:38,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:38,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:50:38,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:50:38,547 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-16 11:50:38,548 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-16 11:50:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-16 11:50:38,548 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-16 11:50:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:50:38,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:50:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:50:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:50:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:50:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:50:38,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:50:38,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:50:38,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:50:38,552 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 11:50:38,748 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:50:38,752 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:50:39,222 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:50:39,234 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:50:39,235 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:50:39,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:50:39 BoogieIcfgContainer [2022-11-16 11:50:39,237 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:50:39,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:50:39,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:50:39,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:50:39,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:50:37" (1/3) ... [2022-11-16 11:50:39,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499ef8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:50:39, skipping insertion in model container [2022-11-16 11:50:39,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:50:38" (2/3) ... [2022-11-16 11:50:39,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499ef8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:50:39, skipping insertion in model container [2022-11-16 11:50:39,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:50:39" (3/3) ... [2022-11-16 11:50:39,271 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-11-16 11:50:39,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:50:39,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-16 11:50:39,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:50:39,438 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:50:39,484 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:50:39,504 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 192 transitions, 400 flow [2022-11-16 11:50:39,508 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 192 transitions, 400 flow [2022-11-16 11:50:39,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 192 transitions, 400 flow [2022-11-16 11:50:39,615 INFO L130 PetriNetUnfolder]: 10/190 cut-off events. [2022-11-16 11:50:39,615 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:50:39,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 190 events. 10/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 490 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 134. Up to 3 conditions per place. [2022-11-16 11:50:39,637 INFO L119 LiptonReduction]: Number of co-enabled transitions 9804 [2022-11-16 11:50:47,757 INFO L134 LiptonReduction]: Checked pairs total: 15493 [2022-11-16 11:50:47,757 INFO L136 LiptonReduction]: Total number of compositions: 198 [2022-11-16 11:50:47,768 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 49 transitions, 114 flow [2022-11-16 11:50:47,864 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 11:50:47,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:50:47,889 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;@44363332, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:50:47,889 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-16 11:50:47,894 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 11:50:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 11:50:47,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:47,900 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 11:50:47,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:47,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:47,906 INFO L85 PathProgramCache]: Analyzing trace with hash 783, now seen corresponding path program 1 times [2022-11-16 11:50:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:47,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233658777] [2022-11-16 11:50:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:47,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:48,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:48,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233658777] [2022-11-16 11:50:48,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233658777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:48,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:48,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 11:50:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008076980] [2022-11-16 11:50:48,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:48,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:50:48,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:48,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:50:48,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:50:48,087 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 11:50:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:48,263 INFO L93 Difference]: Finished difference Result 780 states and 2224 transitions. [2022-11-16 11:50:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:50:48,266 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 11:50:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:48,297 INFO L225 Difference]: With dead ends: 780 [2022-11-16 11:50:48,297 INFO L226 Difference]: Without dead ends: 780 [2022-11-16 11:50:48,299 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 11:50:48,302 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 11:50:48,304 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 11:50:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-11-16 11:50:48,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 780. [2022-11-16 11:50:48,420 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 11:50:48,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2224 transitions. [2022-11-16 11:50:48,428 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2224 transitions. Word has length 1 [2022-11-16 11:50:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:48,428 INFO L495 AbstractCegarLoop]: Abstraction has 780 states and 2224 transitions. [2022-11-16 11:50:48,428 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 11:50:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2224 transitions. [2022-11-16 11:50:48,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:50:48,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:48,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:50:48,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:50:48,430 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:48,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:48,431 INFO L85 PathProgramCache]: Analyzing trace with hash 772264, now seen corresponding path program 1 times [2022-11-16 11:50:48,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:48,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038474397] [2022-11-16 11:50:48,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:48,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:48,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:48,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:48,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038474397] [2022-11-16 11:50:48,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038474397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:48,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:48,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:50:48,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829507479] [2022-11-16 11:50:48,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:48,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:48,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:48,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:48,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:48,827 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 11:50:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:48,930 INFO L93 Difference]: Finished difference Result 754 states and 2169 transitions. [2022-11-16 11:50:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:48,931 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 11:50:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:48,940 INFO L225 Difference]: With dead ends: 754 [2022-11-16 11:50:48,941 INFO L226 Difference]: Without dead ends: 754 [2022-11-16 11:50:48,944 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 11:50:48,946 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 11:50:48,947 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 11:50:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-11-16 11:50:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2022-11-16 11:50:48,994 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 11:50:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2169 transitions. [2022-11-16 11:50:49,000 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2169 transitions. Word has length 3 [2022-11-16 11:50:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:49,000 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 2169 transitions. [2022-11-16 11:50:49,001 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 11:50:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2169 transitions. [2022-11-16 11:50:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:50:49,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:49,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:50:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:50:49,008 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:49,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:49,008 INFO L85 PathProgramCache]: Analyzing trace with hash 772266, now seen corresponding path program 1 times [2022-11-16 11:50:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488651142] [2022-11-16 11:50:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:49,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488651142] [2022-11-16 11:50:49,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488651142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:49,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:49,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:50:49,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477996497] [2022-11-16 11:50:49,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:49,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:49,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:49,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:49,187 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 11:50:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:49,278 INFO L93 Difference]: Finished difference Result 728 states and 2114 transitions. [2022-11-16 11:50:49,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:49,286 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 11:50:49,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:49,292 INFO L225 Difference]: With dead ends: 728 [2022-11-16 11:50:49,293 INFO L226 Difference]: Without dead ends: 728 [2022-11-16 11:50:49,294 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 11:50:49,296 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 11:50:49,297 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 11:50:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-11-16 11:50:49,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-11-16 11:50:49,324 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 11:50:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 2114 transitions. [2022-11-16 11:50:49,330 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 2114 transitions. Word has length 3 [2022-11-16 11:50:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:49,330 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 2114 transitions. [2022-11-16 11:50:49,331 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 11:50:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 2114 transitions. [2022-11-16 11:50:49,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:50:49,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:49,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:50:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:50:49,332 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 11:50:49,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:49,333 INFO L85 PathProgramCache]: Analyzing trace with hash 742164462, now seen corresponding path program 1 times [2022-11-16 11:50:49,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:49,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418850297] [2022-11-16 11:50:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:49,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418850297] [2022-11-16 11:50:49,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418850297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:49,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:49,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:50:49,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744479947] [2022-11-16 11:50:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:49,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:50:49,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:50:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:50:49,478 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 11:50:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:49,568 INFO L93 Difference]: Finished difference Result 560 states and 1572 transitions. [2022-11-16 11:50:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:49,569 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 11:50:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:49,573 INFO L225 Difference]: With dead ends: 560 [2022-11-16 11:50:49,574 INFO L226 Difference]: Without dead ends: 560 [2022-11-16 11:50:49,574 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 11:50:49,575 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 11:50:49,576 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 11:50:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-16 11:50:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-11-16 11:50:49,596 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 11:50:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 1572 transitions. [2022-11-16 11:50:49,599 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 1572 transitions. Word has length 5 [2022-11-16 11:50:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:49,600 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 1572 transitions. [2022-11-16 11:50:49,601 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 11:50:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 1572 transitions. [2022-11-16 11:50:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:50:49,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:49,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:50:49,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:50:49,603 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 11:50:49,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:49,603 INFO L85 PathProgramCache]: Analyzing trace with hash 742164463, now seen corresponding path program 1 times [2022-11-16 11:50:49,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434816191] [2022-11-16 11:50:49,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:49,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:49,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:49,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434816191] [2022-11-16 11:50:49,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434816191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:49,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:49,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:50:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370035187] [2022-11-16 11:50:49,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:49,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:49,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:49,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:49,800 INFO L87 Difference]: Start difference. First operand 560 states and 1572 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:49,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:49,868 INFO L93 Difference]: Finished difference Result 392 states and 1030 transitions. [2022-11-16 11:50:49,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:49,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:50:49,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:49,873 INFO L225 Difference]: With dead ends: 392 [2022-11-16 11:50:49,874 INFO L226 Difference]: Without dead ends: 392 [2022-11-16 11:50:49,874 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 11:50:49,875 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:50:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-16 11:50:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-11-16 11:50:49,887 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 11:50:49,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 1030 transitions. [2022-11-16 11:50:49,891 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 1030 transitions. Word has length 5 [2022-11-16 11:50:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:49,891 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 1030 transitions. [2022-11-16 11:50:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 1030 transitions. [2022-11-16 11:50:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:50:49,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:49,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:50:49,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:50:49,893 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 11:50:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1531769867, now seen corresponding path program 1 times [2022-11-16 11:50:49,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309182049] [2022-11-16 11:50:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:49,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:50,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:50,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309182049] [2022-11-16 11:50:50,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309182049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:50,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:50,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:50:50,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100191988] [2022-11-16 11:50:50,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:50,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:50,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:50,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:50,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:50,005 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 11:50:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:50,144 INFO L93 Difference]: Finished difference Result 558 states and 1422 transitions. [2022-11-16 11:50:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:50,145 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 11:50:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:50,148 INFO L225 Difference]: With dead ends: 558 [2022-11-16 11:50:50,149 INFO L226 Difference]: Without dead ends: 558 [2022-11-16 11:50:50,149 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 11:50:50,150 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 11:50:50,152 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 11:50:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-11-16 11:50:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2022-11-16 11:50:50,170 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 11:50:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1376 transitions. [2022-11-16 11:50:50,173 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1376 transitions. Word has length 6 [2022-11-16 11:50:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1376 transitions. [2022-11-16 11:50:50,174 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 11:50:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1376 transitions. [2022-11-16 11:50:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:50:50,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:50,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:50:50,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:50:50,176 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 11:50:50,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:50,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1531765075, now seen corresponding path program 1 times [2022-11-16 11:50:50,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:50,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324711494] [2022-11-16 11:50:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:50,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:50,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324711494] [2022-11-16 11:50:50,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324711494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:50,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:50,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:50:50,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547451347] [2022-11-16 11:50:50,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:50,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:50:50,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:50,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:50:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:50:50,401 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 11:50:50,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:50,506 INFO L93 Difference]: Finished difference Result 503 states and 1323 transitions. [2022-11-16 11:50:50,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:50:50,507 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 11:50:50,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:50,510 INFO L225 Difference]: With dead ends: 503 [2022-11-16 11:50:50,511 INFO L226 Difference]: Without dead ends: 503 [2022-11-16 11:50:50,511 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 11:50:50,512 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 11:50:50,513 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 11:50:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-11-16 11:50:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 478. [2022-11-16 11:50:50,532 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 11:50:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 1265 transitions. [2022-11-16 11:50:50,535 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 1265 transitions. Word has length 6 [2022-11-16 11:50:50,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:50,536 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 1265 transitions. [2022-11-16 11:50:50,536 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 11:50:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 1265 transitions. [2022-11-16 11:50:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:50:50,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:50,537 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:50:50,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:50:50,538 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 11:50:50,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1531765076, now seen corresponding path program 1 times [2022-11-16 11:50:50,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:50,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505213426] [2022-11-16 11:50:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:50,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:50,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505213426] [2022-11-16 11:50:50,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505213426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:50,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:50,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:50:50,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370692675] [2022-11-16 11:50:50,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:50,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:50:50,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:50,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:50:50,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:50:50,836 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 11:50:51,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:51,036 INFO L93 Difference]: Finished difference Result 540 states and 1414 transitions. [2022-11-16 11:50:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:50:51,037 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 11:50:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:51,041 INFO L225 Difference]: With dead ends: 540 [2022-11-16 11:50:51,041 INFO L226 Difference]: Without dead ends: 540 [2022-11-16 11:50:51,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:51,042 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:51,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:50:51,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-16 11:50:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 498. [2022-11-16 11:50:51,059 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 11:50:51,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1324 transitions. [2022-11-16 11:50:51,062 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1324 transitions. Word has length 6 [2022-11-16 11:50:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:51,062 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1324 transitions. [2022-11-16 11:50:51,062 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 11:50:51,062 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1324 transitions. [2022-11-16 11:50:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:50:51,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:51,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:50:51,064 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 11:50:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 989080575, now seen corresponding path program 1 times [2022-11-16 11:50:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885836891] [2022-11-16 11:50:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:51,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:51,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885836891] [2022-11-16 11:50:51,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885836891] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:51,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:51,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:50:51,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007722361] [2022-11-16 11:50:51,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:51,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:51,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:51,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:51,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:51,186 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 11:50:51,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:51,291 INFO L93 Difference]: Finished difference Result 540 states and 1432 transitions. [2022-11-16 11:50:51,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:51,292 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 11:50:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:51,296 INFO L225 Difference]: With dead ends: 540 [2022-11-16 11:50:51,296 INFO L226 Difference]: Without dead ends: 540 [2022-11-16 11:50:51,297 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 11:50:51,298 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 11:50:51,299 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 11:50:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-16 11:50:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2022-11-16 11:50:51,316 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 11:50:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1432 transitions. [2022-11-16 11:50:51,320 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1432 transitions. Word has length 10 [2022-11-16 11:50:51,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:51,320 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 1432 transitions. [2022-11-16 11:50:51,320 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 11:50:51,321 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1432 transitions. [2022-11-16 11:50:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:50:51,328 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:51,328 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:51,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:50:51,329 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:51,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:51,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1887099682, now seen corresponding path program 1 times [2022-11-16 11:50:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:51,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305151355] [2022-11-16 11:50:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:51,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:51,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305151355] [2022-11-16 11:50:51,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305151355] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:51,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:51,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:50:51,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216043566] [2022-11-16 11:50:51,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:51,388 INFO L87 Difference]: Start difference. First operand 540 states and 1432 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 11:50:51,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:51,497 INFO L93 Difference]: Finished difference Result 600 states and 1579 transitions. [2022-11-16 11:50:51,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:51,498 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 11:50:51,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:51,502 INFO L225 Difference]: With dead ends: 600 [2022-11-16 11:50:51,503 INFO L226 Difference]: Without dead ends: 600 [2022-11-16 11:50:51,503 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 11:50:51,504 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 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 11:50:51,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 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 11:50:51,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-11-16 11:50:51,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 534. [2022-11-16 11:50:51,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 522 states have (on average 2.703065134099617) internal successors, (1411), 533 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1411 transitions. [2022-11-16 11:50:51,533 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1411 transitions. Word has length 13 [2022-11-16 11:50:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:51,533 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 1411 transitions. [2022-11-16 11:50:51,533 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 11:50:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1411 transitions. [2022-11-16 11:50:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:50:51,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:51,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:51,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:50:51,537 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2068437318, now seen corresponding path program 1 times [2022-11-16 11:50:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:51,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173176841] [2022-11-16 11:50:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:51,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:51,654 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 11:50:51,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173176841] [2022-11-16 11:50:51,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173176841] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:51,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316310627] [2022-11-16 11:50:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:51,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:51,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:51,661 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:50:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:51,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:50:51,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:51,905 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 11:50:51,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:51,952 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 11:50:51,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316310627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:51,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:51,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 11:50:51,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615192957] [2022-11-16 11:50:51,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:50:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:50:51,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:50:51,955 INFO L87 Difference]: Start difference. First operand 534 states and 1411 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 11:50:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:52,549 INFO L93 Difference]: Finished difference Result 1250 states and 3185 transitions. [2022-11-16 11:50:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:50:52,550 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 11:50:52,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:52,558 INFO L225 Difference]: With dead ends: 1250 [2022-11-16 11:50:52,558 INFO L226 Difference]: Without dead ends: 1250 [2022-11-16 11:50:52,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:50:52,559 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:52,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:50:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2022-11-16 11:50:52,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 818. [2022-11-16 11:50:52,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 806 states have (on average 2.7555831265508686) internal successors, (2221), 817 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:52,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2221 transitions. [2022-11-16 11:50:52,647 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2221 transitions. Word has length 13 [2022-11-16 11:50:52,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:52,648 INFO L495 AbstractCegarLoop]: Abstraction has 818 states and 2221 transitions. [2022-11-16 11:50:52,648 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 11:50:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2221 transitions. [2022-11-16 11:50:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:50:52,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:52,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:52,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:52,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:50:52,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:50:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2068442109, now seen corresponding path program 1 times [2022-11-16 11:50:52,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:52,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301066795] [2022-11-16 11:50:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:53,520 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 11:50:53,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301066795] [2022-11-16 11:50:53,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301066795] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94682158] [2022-11-16 11:50:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:53,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:50:53,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:50:53,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:50:53,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:50:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:53,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:50:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:53,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:53,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:53,769 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 11:50:54,014 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 11:50:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:54,215 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 11:50:54,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94682158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:50:54,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:50:54,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-16 11:50:54,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798586908] [2022-11-16 11:50:54,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:54,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:50:54,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:54,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:50:54,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:50:54,219 INFO L87 Difference]: Start difference. First operand 818 states and 2221 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 11:50:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:55,139 INFO L93 Difference]: Finished difference Result 1476 states and 3883 transitions. [2022-11-16 11:50:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:50:55,140 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 11:50:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:55,148 INFO L225 Difference]: With dead ends: 1476 [2022-11-16 11:50:55,148 INFO L226 Difference]: Without dead ends: 1476 [2022-11-16 11:50:55,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:50:55,149 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 296 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:55,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:50:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-11-16 11:50:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1144. [2022-11-16 11:50:55,188 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 11:50:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 3095 transitions. [2022-11-16 11:50:55,195 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 3095 transitions. Word has length 13 [2022-11-16 11:50:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:55,195 INFO L495 AbstractCegarLoop]: Abstraction has 1144 states and 3095 transitions. [2022-11-16 11:50:55,195 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 11:50:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 3095 transitions. [2022-11-16 11:50:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:50:55,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:55,197 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 11:50:55,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:55,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:50:55,403 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 11:50:55,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:55,404 INFO L85 PathProgramCache]: Analyzing trace with hash -880172098, now seen corresponding path program 1 times [2022-11-16 11:50:55,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:55,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299964997] [2022-11-16 11:50:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:55,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:55,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:55,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299964997] [2022-11-16 11:50:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299964997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:55,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:55,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:50:55,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946023958] [2022-11-16 11:50:55,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:55,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:55,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:55,500 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 11:50:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:55,596 INFO L93 Difference]: Finished difference Result 470 states and 1082 transitions. [2022-11-16 11:50:55,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:55,597 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 11:50:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:55,600 INFO L225 Difference]: With dead ends: 470 [2022-11-16 11:50:55,600 INFO L226 Difference]: Without dead ends: 470 [2022-11-16 11:50:55,600 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 11:50:55,601 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 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 11:50:55,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 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 11:50:55,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-16 11:50:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 440. [2022-11-16 11:50:55,631 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 11:50:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1005 transitions. [2022-11-16 11:50:55,633 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1005 transitions. Word has length 18 [2022-11-16 11:50:55,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:55,634 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1005 transitions. [2022-11-16 11:50:55,634 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 11:50:55,634 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1005 transitions. [2022-11-16 11:50:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:50:55,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:55,635 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 11:50:55,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:50:55,636 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 11:50:55,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:55,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1375604645, now seen corresponding path program 1 times [2022-11-16 11:50:55,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:55,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644397526] [2022-11-16 11:50:55,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:55,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:56,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:56,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644397526] [2022-11-16 11:50:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644397526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 11:50:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658251010] [2022-11-16 11:50:56,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:50:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:50:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:50:56,178 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 11:50:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:57,388 INFO L93 Difference]: Finished difference Result 808 states and 1805 transitions. [2022-11-16 11:50:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:50:57,401 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 11:50:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:57,406 INFO L225 Difference]: With dead ends: 808 [2022-11-16 11:50:57,406 INFO L226 Difference]: Without dead ends: 808 [2022-11-16 11:50:57,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:50:57,407 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 151 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:57,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 0 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:50:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-11-16 11:50:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 504. [2022-11-16 11:50:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 2.3755020080321283) internal successors, (1183), 503 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1183 transitions. [2022-11-16 11:50:57,430 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1183 transitions. Word has length 19 [2022-11-16 11:50:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:57,431 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 1183 transitions. [2022-11-16 11:50:57,431 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 11:50:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1183 transitions. [2022-11-16 11:50:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:50:57,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:57,432 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 11:50:57,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:50:57,433 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 11:50:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1375604646, now seen corresponding path program 1 times [2022-11-16 11:50:57,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:57,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125297800] [2022-11-16 11:50:57,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:57,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:57,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:57,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125297800] [2022-11-16 11:50:57,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125297800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:57,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:57,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:50:57,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899287909] [2022-11-16 11:50:57,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:57,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:50:57,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:50:57,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:50:57,609 INFO L87 Difference]: Start difference. First operand 504 states and 1183 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 11:50:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:57,813 INFO L93 Difference]: Finished difference Result 645 states and 1507 transitions. [2022-11-16 11:50:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:50:57,814 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 11:50:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:57,817 INFO L225 Difference]: With dead ends: 645 [2022-11-16 11:50:57,818 INFO L226 Difference]: Without dead ends: 645 [2022-11-16 11:50:57,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 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 11:50:57,819 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 118 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:57,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 8 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:50:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-16 11:50:57,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 498. [2022-11-16 11:50:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 493 states have (on average 2.363083164300203) internal successors, (1165), 497 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1165 transitions. [2022-11-16 11:50:57,838 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1165 transitions. Word has length 19 [2022-11-16 11:50:57,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:57,838 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1165 transitions. [2022-11-16 11:50:57,838 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 11:50:57,839 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1165 transitions. [2022-11-16 11:50:57,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 11:50:57,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:57,840 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 11:50:57,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:50:57,840 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 11:50:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1835643073, now seen corresponding path program 1 times [2022-11-16 11:50:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257085152] [2022-11-16 11:50:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:50:57,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257085152] [2022-11-16 11:50:57,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257085152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:57,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:57,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:50:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209352294] [2022-11-16 11:50:57,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:57,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:50:57,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:50:57,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:50:57,906 INFO L87 Difference]: Start difference. First operand 498 states and 1165 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 11:50:58,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:58,027 INFO L93 Difference]: Finished difference Result 674 states and 1533 transitions. [2022-11-16 11:50:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:50:58,028 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 11:50:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:58,032 INFO L225 Difference]: With dead ends: 674 [2022-11-16 11:50:58,032 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 11:50:58,032 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 11:50:58,033 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 11:50:58,034 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 11:50:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 11:50:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 562. [2022-11-16 11:50:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 555 states have (on average 2.308108108108108) internal successors, (1281), 561 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:50:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1281 transitions. [2022-11-16 11:50:58,058 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1281 transitions. Word has length 20 [2022-11-16 11:50:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:58,058 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 1281 transitions. [2022-11-16 11:50:58,059 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 11:50:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1281 transitions. [2022-11-16 11:50:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:50:58,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:58,060 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 11:50:58,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:50:58,061 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 11:50:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash -893892884, now seen corresponding path program 1 times [2022-11-16 11:50:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:50:58,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349053846] [2022-11-16 11:50:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:58,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:50:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:50:59,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:50:59,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349053846] [2022-11-16 11:50:59,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349053846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:59,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:59,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-16 11:50:59,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312223413] [2022-11-16 11:50:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:59,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:50:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:50:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:50:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:50:59,201 INFO L87 Difference]: Start difference. First operand 562 states and 1281 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 11:51:00,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:00,802 INFO L93 Difference]: Finished difference Result 736 states and 1657 transitions. [2022-11-16 11:51:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 11:51:00,803 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 11:51:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:00,807 INFO L225 Difference]: With dead ends: 736 [2022-11-16 11:51:00,807 INFO L226 Difference]: Without dead ends: 736 [2022-11-16 11:51:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:51:00,808 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:00,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 0 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:51:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-16 11:51:00,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 633. [2022-11-16 11:51:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 626 states have (on average 2.279552715654952) internal successors, (1427), 632 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:00,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1427 transitions. [2022-11-16 11:51:00,829 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1427 transitions. Word has length 21 [2022-11-16 11:51:00,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:00,830 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1427 transitions. [2022-11-16 11:51:00,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 11:51:00,830 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1427 transitions. [2022-11-16 11:51:00,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:51:00,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:00,832 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 11:51:00,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:51:00,832 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:00,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1311845986, now seen corresponding path program 2 times [2022-11-16 11:51:00,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:00,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094746495] [2022-11-16 11:51:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:00,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:00,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:02,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:02,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094746495] [2022-11-16 11:51:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094746495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:02,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:02,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:51:02,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961239274] [2022-11-16 11:51:02,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:51:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:51:02,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:51:02,047 INFO L87 Difference]: Start difference. First operand 633 states and 1427 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 11:51:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:03,748 INFO L93 Difference]: Finished difference Result 797 states and 1783 transitions. [2022-11-16 11:51:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:51:03,749 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 11:51:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:03,753 INFO L225 Difference]: With dead ends: 797 [2022-11-16 11:51:03,753 INFO L226 Difference]: Without dead ends: 797 [2022-11-16 11:51:03,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:51:03,754 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:03,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:51:03,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2022-11-16 11:51:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 623. [2022-11-16 11:51:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 616 states have (on average 2.284090909090909) internal successors, (1407), 622 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1407 transitions. [2022-11-16 11:51:03,776 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1407 transitions. Word has length 21 [2022-11-16 11:51:03,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:03,777 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 1407 transitions. [2022-11-16 11:51:03,777 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 11:51:03,778 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1407 transitions. [2022-11-16 11:51:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:51:03,779 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:03,779 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] [2022-11-16 11:51:03,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:51:03,780 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 11:51:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:03,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1461521784, now seen corresponding path program 3 times [2022-11-16 11:51:03,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:03,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049175022] [2022-11-16 11:51:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:04,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:04,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:04,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049175022] [2022-11-16 11:51:04,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049175022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:04,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:04,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:51:04,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308077919] [2022-11-16 11:51:04,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:04,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:51:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:51:04,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:51:04,985 INFO L87 Difference]: Start difference. First operand 623 states and 1407 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 11:51:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:06,556 INFO L93 Difference]: Finished difference Result 741 states and 1667 transitions. [2022-11-16 11:51:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:51:06,557 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 11:51:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:06,562 INFO L225 Difference]: With dead ends: 741 [2022-11-16 11:51:06,562 INFO L226 Difference]: Without dead ends: 741 [2022-11-16 11:51:06,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:51:06,563 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:06,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:51:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-11-16 11:51:06,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 592. [2022-11-16 11:51:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 585 states have (on average 2.292307692307692) internal successors, (1341), 591 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:06,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1341 transitions. [2022-11-16 11:51:06,586 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1341 transitions. Word has length 21 [2022-11-16 11:51:06,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:06,586 INFO L495 AbstractCegarLoop]: Abstraction has 592 states and 1341 transitions. [2022-11-16 11:51:06,586 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 11:51:06,587 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1341 transitions. [2022-11-16 11:51:06,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:51:06,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:06,588 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 11:51:06,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 11:51:06,589 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 514163002, now seen corresponding path program 1 times [2022-11-16 11:51:06,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686104014] [2022-11-16 11:51:06,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:06,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:51:06,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:06,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686104014] [2022-11-16 11:51:06,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686104014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382227104] [2022-11-16 11:51:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:06,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:06,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:06,675 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:06,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:51:06,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:51:06,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:51:06,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:06,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:51:06,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382227104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:06,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:06,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:51:06,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948682365] [2022-11-16 11:51:06,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:06,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:51:06,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:06,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:51:06,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:51:06,890 INFO L87 Difference]: Start difference. First operand 592 states and 1341 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:07,118 INFO L93 Difference]: Finished difference Result 1452 states and 3149 transitions. [2022-11-16 11:51:07,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:51:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 11:51:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:07,127 INFO L225 Difference]: With dead ends: 1452 [2022-11-16 11:51:07,127 INFO L226 Difference]: Without dead ends: 1452 [2022-11-16 11:51:07,128 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 11:51:07,129 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 225 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:07,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 4 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:51:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-11-16 11:51:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1404. [2022-11-16 11:51:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1397 states have (on average 2.224051539012169) internal successors, (3107), 1403 states have internal predecessors, (3107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3107 transitions. [2022-11-16 11:51:07,186 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3107 transitions. Word has length 23 [2022-11-16 11:51:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:07,187 INFO L495 AbstractCegarLoop]: Abstraction has 1404 states and 3107 transitions. [2022-11-16 11:51:07,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3107 transitions. [2022-11-16 11:51:07,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:51:07,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:07,192 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 11:51:07,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:07,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:07,405 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1163467360, now seen corresponding path program 1 times [2022-11-16 11:51:07,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:07,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694937417] [2022-11-16 11:51:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:07,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:07,538 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 11:51:07,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:07,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694937417] [2022-11-16 11:51:07,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694937417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:07,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581235479] [2022-11-16 11:51:07,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:07,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:07,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:07,542 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:07,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:51:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:51:07,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:07,770 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 11:51:07,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:51:07,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581235479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:07,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:51:07,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-16 11:51:07,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48698600] [2022-11-16 11:51:07,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:07,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:51:07,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:07,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:51:07,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:51:07,775 INFO L87 Difference]: Start difference. First operand 1404 states and 3107 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 11:51:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:08,009 INFO L93 Difference]: Finished difference Result 1746 states and 3840 transitions. [2022-11-16 11:51:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:51:08,010 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 11:51:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:08,023 INFO L225 Difference]: With dead ends: 1746 [2022-11-16 11:51:08,023 INFO L226 Difference]: Without dead ends: 1746 [2022-11-16 11:51:08,024 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 11:51:08,024 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:08,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:51:08,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2022-11-16 11:51:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1598. [2022-11-16 11:51:08,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1591 states have (on average 2.251414204902577) internal successors, (3582), 1597 states have internal predecessors, (3582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 3582 transitions. [2022-11-16 11:51:08,082 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 3582 transitions. Word has length 24 [2022-11-16 11:51:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:08,084 INFO L495 AbstractCegarLoop]: Abstraction has 1598 states and 3582 transitions. [2022-11-16 11:51:08,084 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 11:51:08,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 3582 transitions. [2022-11-16 11:51:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 11:51:08,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:08,086 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 11:51:08,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:51:08,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:08,293 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1163472151, now seen corresponding path program 1 times [2022-11-16 11:51:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:08,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656679087] [2022-11-16 11:51:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:08,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:08,790 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 11:51:08,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:08,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656679087] [2022-11-16 11:51:08,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656679087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:08,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638031043] [2022-11-16 11:51:08,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:08,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:08,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:08,794 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:08,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:51:08,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:08,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:51:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:09,506 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 11:51:09,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:09,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:51:09,835 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 11:51:10,009 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 11:51:10,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638031043] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:10,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:10,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-11-16 11:51:10,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406179104] [2022-11-16 11:51:10,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:10,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:51:10,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:10,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:51:10,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-11-16 11:51:10,012 INFO L87 Difference]: Start difference. First operand 1598 states and 3582 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:13,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:13,972 INFO L93 Difference]: Finished difference Result 2376 states and 5032 transitions. [2022-11-16 11:51:13,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-16 11:51:13,973 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 11:51:13,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:13,984 INFO L225 Difference]: With dead ends: 2376 [2022-11-16 11:51:13,985 INFO L226 Difference]: Without dead ends: 2376 [2022-11-16 11:51:13,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=835, Invalid=3455, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:51:13,987 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 542 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:13,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 0 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:51:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2022-11-16 11:51:14,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 1638. [2022-11-16 11:51:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1631 states have (on average 2.218884120171674) internal successors, (3619), 1637 states have internal predecessors, (3619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 3619 transitions. [2022-11-16 11:51:14,064 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 3619 transitions. Word has length 24 [2022-11-16 11:51:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:14,064 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 3619 transitions. [2022-11-16 11:51:14,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 3619 transitions. [2022-11-16 11:51:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:51:14,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:14,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:14,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:14,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:14,274 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:14,274 INFO L85 PathProgramCache]: Analyzing trace with hash 708227826, now seen corresponding path program 2 times [2022-11-16 11:51:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7528610] [2022-11-16 11:51:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:14,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:14,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7528610] [2022-11-16 11:51:14,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7528610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:14,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032391014] [2022-11-16 11:51:14,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:14,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:14,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:14,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:14,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:51:15,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:51:15,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:15,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:51:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:15,597 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 11:51:15,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:51:15,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032391014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:15,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:51:15,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [15] total 25 [2022-11-16 11:51:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808985186] [2022-11-16 11:51:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:15,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:51:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:51:15,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2022-11-16 11:51:15,600 INFO L87 Difference]: Start difference. First operand 1638 states and 3619 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:16,955 INFO L93 Difference]: Finished difference Result 2202 states and 4747 transitions. [2022-11-16 11:51:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:51:16,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 11:51:16,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:16,972 INFO L225 Difference]: With dead ends: 2202 [2022-11-16 11:51:16,977 INFO L226 Difference]: Without dead ends: 2202 [2022-11-16 11:51:16,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 11:51:16,979 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 260 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:16,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 0 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:51:16,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2022-11-16 11:51:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1778. [2022-11-16 11:51:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1771 states have (on average 2.1948051948051948) internal successors, (3887), 1777 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 3887 transitions. [2022-11-16 11:51:17,044 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 3887 transitions. Word has length 26 [2022-11-16 11:51:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:17,044 INFO L495 AbstractCegarLoop]: Abstraction has 1778 states and 3887 transitions. [2022-11-16 11:51:17,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:17,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 3887 transitions. [2022-11-16 11:51:17,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:51:17,047 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:17,047 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 11:51:17,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:17,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 11:51:17,253 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -431639142, now seen corresponding path program 2 times [2022-11-16 11:51:17,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:17,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448891590] [2022-11-16 11:51:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:17,520 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 11:51:17,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448891590] [2022-11-16 11:51:17,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448891590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:17,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948532714] [2022-11-16 11:51:17,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:17,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:17,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:17,523 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:17,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:51:17,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:51:17,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:51:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:17,791 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 11:51:17,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:17,890 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 11:51:17,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948532714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:17,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-11-16 11:51:17,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973476583] [2022-11-16 11:51:17,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:17,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:51:17,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:17,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:51:17,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:51:17,894 INFO L87 Difference]: Start difference. First operand 1778 states and 3887 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:18,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:18,410 INFO L93 Difference]: Finished difference Result 2666 states and 5693 transitions. [2022-11-16 11:51:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:51:18,411 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have 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 11:51:18,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:18,419 INFO L225 Difference]: With dead ends: 2666 [2022-11-16 11:51:18,419 INFO L226 Difference]: Without dead ends: 2666 [2022-11-16 11:51:18,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:51:18,420 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 190 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:18,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 0 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:51:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2022-11-16 11:51:18,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2006. [2022-11-16 11:51:18,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 1999 states have (on average 2.189094547273637) internal successors, (4376), 2005 states have internal predecessors, (4376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 4376 transitions. [2022-11-16 11:51:18,488 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 4376 transitions. Word has length 27 [2022-11-16 11:51:18,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:18,488 INFO L495 AbstractCegarLoop]: Abstraction has 2006 states and 4376 transitions. [2022-11-16 11:51:18,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:18,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 4376 transitions. [2022-11-16 11:51:18,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 11:51:18,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:18,491 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-16 11:51:18,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 11:51:18,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 11:51:18,696 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:18,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:18,697 INFO L85 PathProgramCache]: Analyzing trace with hash -431643933, now seen corresponding path program 2 times [2022-11-16 11:51:18,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:18,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176999244] [2022-11-16 11:51:18,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:18,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:19,841 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 11:51:19,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:19,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176999244] [2022-11-16 11:51:19,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176999244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:19,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023930528] [2022-11-16 11:51:19,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:19,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:19,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:19,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:19,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:51:20,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:51:20,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:20,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-16 11:51:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:20,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:20,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:20,059 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 11:51:20,590 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 11:51:20,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:21,093 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 11:51:21,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023930528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:21,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:21,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 32 [2022-11-16 11:51:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228220922] [2022-11-16 11:51:21,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:51:21,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:51:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:51:21,096 INFO L87 Difference]: Start difference. First operand 2006 states and 4376 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 11:51:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:23,300 INFO L93 Difference]: Finished difference Result 2690 states and 5692 transitions. [2022-11-16 11:51:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:51:23,301 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 11:51:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:23,309 INFO L225 Difference]: With dead ends: 2690 [2022-11-16 11:51:23,309 INFO L226 Difference]: Without dead ends: 2690 [2022-11-16 11:51:23,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:51:23,310 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 443 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:23,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 0 Invalid, 2251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 11:51:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2022-11-16 11:51:23,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2142. [2022-11-16 11:51:23,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2142 states, 2135 states have (on average 2.1728337236533957) internal successors, (4639), 2141 states have internal predecessors, (4639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 4639 transitions. [2022-11-16 11:51:23,383 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 4639 transitions. Word has length 27 [2022-11-16 11:51:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:23,383 INFO L495 AbstractCegarLoop]: Abstraction has 2142 states and 4639 transitions. [2022-11-16 11:51:23,383 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 11:51:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 4639 transitions. [2022-11-16 11:51:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:51:23,386 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:23,386 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 11:51:23,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:23,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:23,593 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 11:51:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:23,593 INFO L85 PathProgramCache]: Analyzing trace with hash 2002078457, now seen corresponding path program 4 times [2022-11-16 11:51:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814686444] [2022-11-16 11:51:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:23,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:24,804 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 11:51:24,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:24,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814686444] [2022-11-16 11:51:24,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814686444] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:24,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475011869] [2022-11-16 11:51:24,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:51:24,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:24,806 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:24,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:51:24,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:51:24,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 11:51:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:25,463 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 19 treesize of output 15 [2022-11-16 11:51:26,263 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 76 treesize of output 44 [2022-11-16 11:51:26,368 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 11:51:26,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:26,925 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 11:51:27,194 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 11:51:27,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475011869] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:27,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:27,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [17, 15] total 45 [2022-11-16 11:51:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459467333] [2022-11-16 11:51:27,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:27,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:51:27,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:51:27,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1922, Unknown=0, NotChecked=0, Total=2070 [2022-11-16 11:51:27,201 INFO L87 Difference]: Start difference. First operand 2142 states and 4639 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:30,651 INFO L93 Difference]: Finished difference Result 3655 states and 7834 transitions. [2022-11-16 11:51:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:51:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:51:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:30,663 INFO L225 Difference]: With dead ends: 3655 [2022-11-16 11:51:30,663 INFO L226 Difference]: Without dead ends: 3655 [2022-11-16 11:51:30,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=416, Invalid=4840, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:51:30,666 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 250 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:30,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 8 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:51:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-11-16 11:51:30,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 2199. [2022-11-16 11:51:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2192 states have (on average 2.179288321167883) internal successors, (4777), 2198 states have internal predecessors, (4777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:30,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 4777 transitions. [2022-11-16 11:51:30,747 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 4777 transitions. Word has length 28 [2022-11-16 11:51:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:30,747 INFO L495 AbstractCegarLoop]: Abstraction has 2199 states and 4777 transitions. [2022-11-16 11:51:30,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:30,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 4777 transitions. [2022-11-16 11:51:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:51:30,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:30,750 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 11:51:30,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:30,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-16 11:51:30,959 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 11:51:30,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:30,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1246468141, now seen corresponding path program 5 times [2022-11-16 11:51:30,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:30,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111954355] [2022-11-16 11:51:30,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:30,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:32,612 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 11:51:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111954355] [2022-11-16 11:51:32,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111954355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:32,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133167164] [2022-11-16 11:51:32,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:51:32,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:32,618 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:32,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:51:32,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:51:32,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:32,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 11:51:32,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:32,884 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 11:51:32,885 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 11:51:33,246 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 19 treesize of output 15 [2022-11-16 11:51:33,341 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 56 treesize of output 52 [2022-11-16 11:51:34,179 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 108 treesize of output 44 [2022-11-16 11:51:34,341 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 11:51:34,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:35,006 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_716 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_716) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-16 11:51:35,035 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:51:35,036 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 11:51:35,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:51:35,061 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 11:51:35,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-16 11:51:35,505 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 11:51:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133167164] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:35,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:35,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 45 [2022-11-16 11:51:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386718266] [2022-11-16 11:51:35,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-16 11:51:35,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-16 11:51:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1938, Unknown=1, NotChecked=88, Total=2162 [2022-11-16 11:51:35,508 INFO L87 Difference]: Start difference. First operand 2199 states and 4777 transitions. Second operand has 47 states, 46 states have (on average 1.826086956521739) internal successors, (84), 46 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:51,266 INFO L93 Difference]: Finished difference Result 4835 states and 10180 transitions. [2022-11-16 11:51:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-16 11:51:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.826086956521739) internal successors, (84), 46 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have 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 11:51:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:51,281 INFO L225 Difference]: With dead ends: 4835 [2022-11-16 11:51:51,281 INFO L226 Difference]: Without dead ends: 4835 [2022-11-16 11:51:51,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 1 IntricatePredicates, 4 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1300, Invalid=9833, Unknown=1, NotChecked=208, Total=11342 [2022-11-16 11:51:51,285 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1059 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:51,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 0 Invalid, 4839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 4551 Invalid, 0 Unknown, 232 Unchecked, 4.4s Time] [2022-11-16 11:51:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4835 states. [2022-11-16 11:51:51,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4835 to 2361. [2022-11-16 11:51:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2354 states have (on average 2.153355989804588) internal successors, (5069), 2360 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:51,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 5069 transitions. [2022-11-16 11:51:51,372 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 5069 transitions. Word has length 28 [2022-11-16 11:51:51,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:51,373 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 5069 transitions. [2022-11-16 11:51:51,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.826086956521739) internal successors, (84), 46 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:51,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 5069 transitions. [2022-11-16 11:51:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 11:51:51,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:51,376 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 11:51:51,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 11:51:51,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:51:51,583 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:51,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1351229646, now seen corresponding path program 2 times [2022-11-16 11:51:51,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:51,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579585107] [2022-11-16 11:51:51,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:51,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:51,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:52,603 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 11:51:52,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579585107] [2022-11-16 11:51:52,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579585107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:52,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749190599] [2022-11-16 11:51:52,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:52,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:52,605 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:52,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:51:52,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:51:52,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:52,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 11:51:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:52,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:52,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:51:52,869 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 11:51:53,475 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 11:51:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:54,060 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 11:51:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749190599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:54,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:51:54,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 33 [2022-11-16 11:51:54,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146028609] [2022-11-16 11:51:54,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:54,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 11:51:54,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:54,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 11:51:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 11:51:54,063 INFO L87 Difference]: Start difference. First operand 2361 states and 5069 transitions. Second operand has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 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 11:51:56,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:56,407 INFO L93 Difference]: Finished difference Result 3723 states and 7812 transitions. [2022-11-16 11:51:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:51:56,407 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 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 11:51:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:56,416 INFO L225 Difference]: With dead ends: 3723 [2022-11-16 11:51:56,416 INFO L226 Difference]: Without dead ends: 3723 [2022-11-16 11:51:56,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=457, Invalid=2405, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:51:56,418 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 630 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:56,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 0 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:51:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3723 states. [2022-11-16 11:51:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3723 to 2735. [2022-11-16 11:51:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2735 states, 2728 states have (on average 2.1759530791788855) internal successors, (5936), 2734 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2735 states to 2735 states and 5936 transitions. [2022-11-16 11:51:56,502 INFO L78 Accepts]: Start accepts. Automaton has 2735 states and 5936 transitions. Word has length 31 [2022-11-16 11:51:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:56,502 INFO L495 AbstractCegarLoop]: Abstraction has 2735 states and 5936 transitions. [2022-11-16 11:51:56,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 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 11:51:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2735 states and 5936 transitions. [2022-11-16 11:51:56,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:51:56,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:56,506 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:56,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:56,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:56,712 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:56,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:56,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1275407233, now seen corresponding path program 2 times [2022-11-16 11:51:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:56,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310735044] [2022-11-16 11:51:56,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 11:51:56,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310735044] [2022-11-16 11:51:56,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310735044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:56,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672777345] [2022-11-16 11:51:56,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:51:56,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:56,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:56,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:56,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:51:56,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:51:56,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:51:56,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:51:56,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-16 11:51:57,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:51:57,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672777345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:57,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:51:57,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2022-11-16 11:51:57,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134443696] [2022-11-16 11:51:57,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:57,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:51:57,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:51:57,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:51:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:51:57,307 INFO L87 Difference]: Start difference. First operand 2735 states and 5936 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 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 11:51:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:57,340 INFO L93 Difference]: Finished difference Result 3354 states and 7274 transitions. [2022-11-16 11:51:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:51:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 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 32 [2022-11-16 11:51:57,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:57,365 INFO L225 Difference]: With dead ends: 3354 [2022-11-16 11:51:57,366 INFO L226 Difference]: Without dead ends: 3305 [2022-11-16 11:51:57,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 11:51:57,367 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:57,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2022-11-16 11:51:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2022-11-16 11:51:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3127. [2022-11-16 11:51:57,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3127 states, 3120 states have (on average 2.1657051282051283) internal successors, (6757), 3126 states have internal predecessors, (6757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:51:57,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3127 states to 3127 states and 6757 transitions. [2022-11-16 11:51:57,452 INFO L78 Accepts]: Start accepts. Automaton has 3127 states and 6757 transitions. Word has length 32 [2022-11-16 11:51:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:57,453 INFO L495 AbstractCegarLoop]: Abstraction has 3127 states and 6757 transitions. [2022-11-16 11:51:57,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 2 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 11:51:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3127 states and 6757 transitions. [2022-11-16 11:51:57,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:51:57,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:57,458 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:57,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:57,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 11:51:57,666 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:51:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1727776117, now seen corresponding path program 1 times [2022-11-16 11:51:57,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:51:57,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353702007] [2022-11-16 11:51:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:57,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:51:57,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:58,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:51:58,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353702007] [2022-11-16 11:51:58,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353702007] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:58,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155060277] [2022-11-16 11:51:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:58,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:51:58,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:51:58,278 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:51:58,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:51:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:51:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:51:59,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:59,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:51:59,935 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 11:52:00,061 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 11:52:00,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155060277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:00,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:00,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 39 [2022-11-16 11:52:00,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527479353] [2022-11-16 11:52:00,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:00,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:52:00,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:52:00,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:52:00,064 INFO L87 Difference]: Start difference. First operand 3127 states and 6757 transitions. Second operand has 41 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:04,482 INFO L93 Difference]: Finished difference Result 3733 states and 7923 transitions. [2022-11-16 11:52:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:52:04,482 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 11:52:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:04,490 INFO L225 Difference]: With dead ends: 3733 [2022-11-16 11:52:04,490 INFO L226 Difference]: Without dead ends: 3733 [2022-11-16 11:52:04,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 985 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1042, Invalid=4508, Unknown=0, NotChecked=0, Total=5550 [2022-11-16 11:52:04,492 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 479 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:04,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 0 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2963 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:52:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2022-11-16 11:52:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3121. [2022-11-16 11:52:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3115 states have (on average 2.1614767255216694) internal successors, (6733), 3120 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 6733 transitions. [2022-11-16 11:52:04,611 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 6733 transitions. Word has length 34 [2022-11-16 11:52:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:04,611 INFO L495 AbstractCegarLoop]: Abstraction has 3121 states and 6733 transitions. [2022-11-16 11:52:04,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 6733 transitions. [2022-11-16 11:52:04,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:52:04,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:04,616 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:52:04,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:52:04,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:04,823 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 11:52:04,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:04,823 INFO L85 PathProgramCache]: Analyzing trace with hash -513581912, now seen corresponding path program 6 times [2022-11-16 11:52:04,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:04,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309570157] [2022-11-16 11:52:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:04,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:52:07,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:07,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309570157] [2022-11-16 11:52:07,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309570157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:52:07,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130413714] [2022-11-16 11:52:07,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:52:07,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:07,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:52:07,602 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:52:07,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:52:07,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-16 11:52:07,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:52:07,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:52:07,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:07,829 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 11:52:07,830 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 11:52:08,284 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 19 treesize of output 15 [2022-11-16 11:52:08,393 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 56 treesize of output 52 [2022-11-16 11:52:09,195 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 108 treesize of output 44 [2022-11-16 11:52:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:52:09,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:10,210 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:52:10,211 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 11:52:10,222 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:52:10,222 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 11:52:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-16 11:52:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:52:10,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130413714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:10,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:10,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 14] total 51 [2022-11-16 11:52:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593991842] [2022-11-16 11:52:10,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-16 11:52:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-16 11:52:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2588, Unknown=7, NotChecked=0, Total=2756 [2022-11-16 11:52:10,659 INFO L87 Difference]: Start difference. First operand 3121 states and 6733 transitions. Second operand has 53 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:32,343 INFO L93 Difference]: Finished difference Result 4909 states and 10399 transitions. [2022-11-16 11:52:32,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-16 11:52:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-16 11:52:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:32,352 INFO L225 Difference]: With dead ends: 4909 [2022-11-16 11:52:32,353 INFO L226 Difference]: Without dead ends: 4909 [2022-11-16 11:52:32,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1690, Invalid=13555, Unknown=7, NotChecked=0, Total=15252 [2022-11-16 11:52:32,358 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1756 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7454 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:32,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 0 Invalid, 7555 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [85 Valid, 7454 Invalid, 0 Unknown, 16 Unchecked, 7.6s Time] [2022-11-16 11:52:32,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2022-11-16 11:52:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 3054. [2022-11-16 11:52:32,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3048 states have (on average 2.161745406824147) internal successors, (6589), 3053 states have internal predecessors, (6589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 6589 transitions. [2022-11-16 11:52:32,493 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 6589 transitions. Word has length 35 [2022-11-16 11:52:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:32,493 INFO L495 AbstractCegarLoop]: Abstraction has 3054 states and 6589 transitions. [2022-11-16 11:52:32,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:32,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 6589 transitions. [2022-11-16 11:52:32,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:52:32,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:32,501 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 11:52:32,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:52:32,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:32,713 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 11:52:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1759465554, now seen corresponding path program 1 times [2022-11-16 11:52:32,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:32,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040615] [2022-11-16 11:52:32,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:32,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:34,123 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 11:52:34,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:34,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040615] [2022-11-16 11:52:34,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:52:34,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860670549] [2022-11-16 11:52:34,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:34,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:34,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:52:34,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:52:34,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:52:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:34,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-16 11:52:34,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:34,776 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 19 treesize of output 15 [2022-11-16 11:52:35,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:52:35,318 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 49 treesize of output 36 [2022-11-16 11:52:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:52:36,446 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 84 treesize of output 44 [2022-11-16 11:52:36,571 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 11:52:36,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:38,260 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 57 treesize of output 48 [2022-11-16 11:52:38,746 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 11:52:38,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860670549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:38,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:38,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 19] total 58 [2022-11-16 11:52:38,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840178652] [2022-11-16 11:52:38,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:38,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 11:52:38,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:38,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 11:52:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=3177, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 11:52:38,749 INFO L87 Difference]: Start difference. First operand 3054 states and 6589 transitions. Second operand has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 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 11:52:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:52:50,000 INFO L93 Difference]: Finished difference Result 6335 states and 13404 transitions. [2022-11-16 11:52:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-16 11:52:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 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 11:52:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:52:50,017 INFO L225 Difference]: With dead ends: 6335 [2022-11-16 11:52:50,018 INFO L226 Difference]: Without dead ends: 6335 [2022-11-16 11:52:50,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4570 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1577, Invalid=11763, Unknown=0, NotChecked=0, Total=13340 [2022-11-16 11:52:50,021 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 938 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 5200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1365 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:52:50,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 4 Invalid, 5200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3775 Invalid, 0 Unknown, 1365 Unchecked, 3.9s Time] [2022-11-16 11:52:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2022-11-16 11:52:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 4529. [2022-11-16 11:52:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4529 states, 4523 states have (on average 2.215122706168472) internal successors, (10019), 4528 states have internal predecessors, (10019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:52:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4529 states to 4529 states and 10019 transitions. [2022-11-16 11:52:50,174 INFO L78 Accepts]: Start accepts. Automaton has 4529 states and 10019 transitions. Word has length 36 [2022-11-16 11:52:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:52:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 4529 states and 10019 transitions. [2022-11-16 11:52:50,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.8305084745762712) internal successors, (108), 59 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 11:52:50,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4529 states and 10019 transitions. [2022-11-16 11:52:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:52:50,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:52:50,180 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 11:52:50,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:52:50,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 11:52:50,389 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 11:52:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:52:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1764838824, now seen corresponding path program 2 times [2022-11-16 11:52:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:52:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242639347] [2022-11-16 11:52:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:52:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:52:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:52:51,840 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 11:52:51,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:52:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242639347] [2022-11-16 11:52:51,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242639347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:52:51,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134152387] [2022-11-16 11:52:51,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:52:51,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:52:51,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:52:51,843 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:52:51,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:52:52,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:52:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:52:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 11:52:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:52,608 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 19 treesize of output 15 [2022-11-16 11:52:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:52:53,122 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 69 treesize of output 41 [2022-11-16 11:52:53,986 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 108 treesize of output 44 [2022-11-16 11:52:54,133 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 11:52:54,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:55,420 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 11:52:55,677 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 11:52:55,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134152387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:52:55,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:52:55,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 55 [2022-11-16 11:52:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161502246] [2022-11-16 11:52:55,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:52:55,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 11:52:55,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:52:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 11:52:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2904, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 11:52:55,682 INFO L87 Difference]: Start difference. First operand 4529 states and 10019 transitions. Second operand has 56 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 56 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 11:53:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:45,026 INFO L93 Difference]: Finished difference Result 10909 states and 23444 transitions. [2022-11-16 11:53:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-11-16 11:53:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 56 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 11:53:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:45,057 INFO L225 Difference]: With dead ends: 10909 [2022-11-16 11:53:45,057 INFO L226 Difference]: Without dead ends: 10909 [2022-11-16 11:53:45,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8871 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=3425, Invalid=25987, Unknown=0, NotChecked=0, Total=29412 [2022-11-16 11:53:45,061 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1492 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 8632 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1492 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 9154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 8632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 422 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:45,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1492 Valid, 2 Invalid, 9154 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [100 Valid, 8632 Invalid, 0 Unknown, 422 Unchecked, 10.8s Time] [2022-11-16 11:53:45,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2022-11-16 11:53:45,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 4613. [2022-11-16 11:53:45,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4607 states have (on average 2.199696114608205) internal successors, (10134), 4612 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:53:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 10134 transitions. [2022-11-16 11:53:45,258 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 10134 transitions. Word has length 36 [2022-11-16 11:53:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:45,258 INFO L495 AbstractCegarLoop]: Abstraction has 4613 states and 10134 transitions. [2022-11-16 11:53:45,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.9636363636363636) internal successors, (108), 56 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 11:53:45,259 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 10134 transitions. [2022-11-16 11:53:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:53:45,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:45,264 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 11:53:45,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:45,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-16 11:53:45,472 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 11:53:45,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:45,472 INFO L85 PathProgramCache]: Analyzing trace with hash 517459484, now seen corresponding path program 3 times [2022-11-16 11:53:45,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:53:45,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759937839] [2022-11-16 11:53:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:53:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,479 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 11:53:47,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:53:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759937839] [2022-11-16 11:53:47,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759937839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:47,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893880318] [2022-11-16 11:53:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:53:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:53:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:53:47,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:53:47,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:53:47,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 11:53:47,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:53:47,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:53:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:47,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 11:53:47,843 INFO L321 Elim1Store]: treesize reduction 40, result has 45.2 percent of original size [2022-11-16 11:53:47,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 55 [2022-11-16 11:53:48,361 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-16 11:53:48,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-11-16 11:53:48,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-16 11:53:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:49,263 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 49 treesize of output 36 [2022-11-16 11:53:50,234 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 76 treesize of output 44 [2022-11-16 11:53:50,341 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 11:53:50,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:52,588 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 11:53:52,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893880318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:53:52,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:53:52,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 56 [2022-11-16 11:53:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689570277] [2022-11-16 11:53:52,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:52,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-16 11:53:52,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:52,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-16 11:53:52,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=3071, Unknown=27, NotChecked=0, Total=3306 [2022-11-16 11:53:52,592 INFO L87 Difference]: Start difference. First operand 4613 states and 10134 transitions. Second operand has 58 states, 57 states have (on average 1.894736842105263) internal successors, (108), 57 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 11:54:05,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:05,165 INFO L93 Difference]: Finished difference Result 6238 states and 13317 transitions. [2022-11-16 11:54:05,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-16 11:54:05,165 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.894736842105263) internal successors, (108), 57 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 11:54:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:05,179 INFO L225 Difference]: With dead ends: 6238 [2022-11-16 11:54:05,179 INFO L226 Difference]: Without dead ends: 6238 [2022-11-16 11:54:05,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3117 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=892, Invalid=10423, Unknown=27, NotChecked=0, Total=11342 [2022-11-16 11:54:05,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 694 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6259 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 6259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 623 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:05,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 0 Invalid, 6916 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [34 Valid, 6259 Invalid, 0 Unknown, 623 Unchecked, 5.6s Time] [2022-11-16 11:54:05,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2022-11-16 11:54:05,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 4832. [2022-11-16 11:54:05,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4832 states, 4826 states have (on average 2.20907583920431) internal successors, (10661), 4831 states have internal predecessors, (10661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:54:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4832 states to 4832 states and 10661 transitions. [2022-11-16 11:54:05,330 INFO L78 Accepts]: Start accepts. Automaton has 4832 states and 10661 transitions. Word has length 36 [2022-11-16 11:54:05,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:05,330 INFO L495 AbstractCegarLoop]: Abstraction has 4832 states and 10661 transitions. [2022-11-16 11:54:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.894736842105263) internal successors, (108), 57 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 11:54:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 4832 states and 10661 transitions. [2022-11-16 11:54:05,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:54:05,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:05,337 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 11:54:05,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:05,544 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 11:54:05,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 361527606, now seen corresponding path program 4 times [2022-11-16 11:54:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:05,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19662678] [2022-11-16 11:54:05,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:05,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:07,520 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 11:54:07,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:07,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19662678] [2022-11-16 11:54:07,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19662678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:07,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822311342] [2022-11-16 11:54:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:54:07,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:07,523 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:07,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:54:07,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:54:07,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:54:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 11:54:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:07,784 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 11:54:07,786 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 11:54:08,173 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 19 treesize of output 15 [2022-11-16 11:54:08,477 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 40 treesize of output 36 [2022-11-16 11:54:08,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:08,914 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 49 treesize of output 36 [2022-11-16 11:54:09,982 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 76 treesize of output 44 [2022-11-16 11:54:10,128 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 11:54:10,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:11,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:11,987 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 11:54:12,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:12,001 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 11:54:12,007 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 11:54:12,471 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 11:54:12,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822311342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:12,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:12,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 59 [2022-11-16 11:54:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128845123] [2022-11-16 11:54:12,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:12,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-16 11:54:12,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-16 11:54:12,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=3363, Unknown=22, NotChecked=0, Total=3660 [2022-11-16 11:54:12,473 INFO L87 Difference]: Start difference. First operand 4832 states and 10661 transitions. Second operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:34,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:34,944 INFO L93 Difference]: Finished difference Result 9112 states and 19567 transitions. [2022-11-16 11:54:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-16 11:54:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:34,959 INFO L225 Difference]: With dead ends: 9112 [2022-11-16 11:54:34,959 INFO L226 Difference]: Without dead ends: 9112 [2022-11-16 11:54:34,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3989 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1529, Invalid=12963, Unknown=28, NotChecked=0, Total=14520 [2022-11-16 11:54:34,962 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 918 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 7518 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 9002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1385 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:34,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 1 Invalid, 9002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [99 Valid, 7518 Invalid, 0 Unknown, 1385 Unchecked, 7.5s Time] [2022-11-16 11:54:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9112 states. [2022-11-16 11:54:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9112 to 5390. [2022-11-16 11:54:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5390 states, 5384 states have (on average 2.2416419019316494) internal successors, (12069), 5389 states have internal predecessors, (12069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:54:35,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 12069 transitions. [2022-11-16 11:54:35,134 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 12069 transitions. Word has length 36 [2022-11-16 11:54:35,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:35,135 INFO L495 AbstractCegarLoop]: Abstraction has 5390 states and 12069 transitions. [2022-11-16 11:54:35,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 12069 transitions. [2022-11-16 11:54:35,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:54:35,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:35,141 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 11:54:35,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:35,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:35,354 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 11:54:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1986715020, now seen corresponding path program 5 times [2022-11-16 11:54:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:35,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973093287] [2022-11-16 11:54:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:37,306 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 11:54:37,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:37,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973093287] [2022-11-16 11:54:37,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973093287] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:37,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907560851] [2022-11-16 11:54:37,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:54:37,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:37,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:37,309 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:37,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:54:37,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:54:37,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:54:37,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:54:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:37,575 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 11:54:37,575 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 11:54:38,065 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 19 treesize of output 15 [2022-11-16 11:54:38,627 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 57 treesize of output 53 [2022-11-16 11:54:39,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:39,275 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 66 treesize of output 41 [2022-11-16 11:54:41,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:54:41,200 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 93 treesize of output 45 [2022-11-16 11:54:41,366 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 11:54:41,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:43,281 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:43,282 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 11:54:43,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:43,297 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 11:54:43,304 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 11:54:44,216 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 11:54:44,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907560851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:44,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:44,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 59 [2022-11-16 11:54:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857060353] [2022-11-16 11:54:44,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:44,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-16 11:54:44,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-16 11:54:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=3397, Unknown=3, NotChecked=0, Total=3660 [2022-11-16 11:54:44,221 INFO L87 Difference]: Start difference. First operand 5390 states and 12069 transitions. Second operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:49,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:49,597 INFO L93 Difference]: Finished difference Result 7110 states and 16195 transitions. [2022-11-16 11:54:49,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 11:54:49,598 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:49,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:49,612 INFO L225 Difference]: With dead ends: 7110 [2022-11-16 11:54:49,612 INFO L226 Difference]: Without dead ends: 7110 [2022-11-16 11:54:49,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=607, Invalid=7946, Unknown=3, NotChecked=0, Total=8556 [2022-11-16 11:54:49,613 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 214 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 2332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1195 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:49,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 4 Invalid, 2332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1127 Invalid, 0 Unknown, 1195 Unchecked, 1.2s Time] [2022-11-16 11:54:49,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7110 states. [2022-11-16 11:54:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7110 to 5988. [2022-11-16 11:54:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5988 states, 5982 states have (on average 2.268472082915413) internal successors, (13570), 5987 states have internal predecessors, (13570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:54:49,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5988 states to 5988 states and 13570 transitions. [2022-11-16 11:54:49,770 INFO L78 Accepts]: Start accepts. Automaton has 5988 states and 13570 transitions. Word has length 36 [2022-11-16 11:54:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:49,770 INFO L495 AbstractCegarLoop]: Abstraction has 5988 states and 13570 transitions. [2022-11-16 11:54:49,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:54:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 5988 states and 13570 transitions. [2022-11-16 11:54:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 11:54:49,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:49,777 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 11:54:49,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:49,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:49,985 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:54:49,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash 254690968, now seen corresponding path program 6 times [2022-11-16 11:54:49,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:54:49,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047816290] [2022-11-16 11:54:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:54:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:52,008 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 11:54:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047816290] [2022-11-16 11:54:52,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047816290] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:52,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505549583] [2022-11-16 11:54:52,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:54:52,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:54:52,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:54:52,011 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:54:52,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:54:52,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 11:54:52,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:54:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-16 11:54:52,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:52,301 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 11:54:52,302 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 20 treesize of output 22 [2022-11-16 11:54:52,652 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 19 treesize of output 15 [2022-11-16 11:54:52,969 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 60 treesize of output 56 [2022-11-16 11:54:53,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:53,360 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 69 treesize of output 41 [2022-11-16 11:54:54,547 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 108 treesize of output 44 [2022-11-16 11:54:54,681 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 11:54:54,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:56,702 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1358 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1358) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-16 11:54:56,710 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:56,711 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 11:54:56,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:54:56,730 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 11:54:56,743 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 11:54:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-16 11:54:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505549583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:57,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:54:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 59 [2022-11-16 11:54:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532516722] [2022-11-16 11:54:57,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-16 11:54:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:54:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-16 11:54:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3346, Unknown=22, NotChecked=116, Total=3660 [2022-11-16 11:54:57,192 INFO L87 Difference]: Start difference. First operand 5988 states and 13570 transitions. Second operand has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:56:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:00,642 INFO L93 Difference]: Finished difference Result 16158 states and 34337 transitions. [2022-11-16 11:56:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-11-16 11:56:00,643 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:56:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:00,671 INFO L225 Difference]: With dead ends: 16158 [2022-11-16 11:56:00,672 INFO L226 Difference]: Without dead ends: 16158 [2022-11-16 11:56:00,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 1 IntricatePredicates, 12 DeprecatedPredicates, 16661 ImplicationChecksByTransitivity, 50.7s TimeCoverageRelationStatistics Valid=4640, Invalid=48012, Unknown=22, NotChecked=456, Total=53130 [2022-11-16 11:56:00,677 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2918 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12358 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2918 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 14605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 12358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2083 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:00,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2918 Valid, 7 Invalid, 14605 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [164 Valid, 12358 Invalid, 0 Unknown, 2083 Unchecked, 16.6s Time] [2022-11-16 11:56:00,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16158 states. [2022-11-16 11:56:00,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16158 to 5133. [2022-11-16 11:56:00,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5133 states, 5127 states have (on average 2.207333723425005) internal successors, (11317), 5132 states have internal predecessors, (11317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:00,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5133 states to 5133 states and 11317 transitions. [2022-11-16 11:56:00,974 INFO L78 Accepts]: Start accepts. Automaton has 5133 states and 11317 transitions. Word has length 36 [2022-11-16 11:56:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:00,974 INFO L495 AbstractCegarLoop]: Abstraction has 5133 states and 11317 transitions. [2022-11-16 11:56:00,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.8) internal successors, (108), 60 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 11:56:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5133 states and 11317 transitions. [2022-11-16 11:56:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:56:00,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:00,980 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:00,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:01,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 11:56:01,187 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:56:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash -820951779, now seen corresponding path program 1 times [2022-11-16 11:56:01,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23039119] [2022-11-16 11:56:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:01,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:56:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23039119] [2022-11-16 11:56:01,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23039119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:01,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573384646] [2022-11-16 11:56:01,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:01,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:01,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:01,258 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:01,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:56:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:01,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:56:01,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:56:01,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:56:01,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573384646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:01,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:01,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:56:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836502369] [2022-11-16 11:56:01,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:01,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:56:01,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:01,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:56:01,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:56:01,589 INFO L87 Difference]: Start difference. First operand 5133 states and 11317 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:01,850 INFO L93 Difference]: Finished difference Result 6313 states and 12976 transitions. [2022-11-16 11:56:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:56:01,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-16 11:56:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:01,866 INFO L225 Difference]: With dead ends: 6313 [2022-11-16 11:56:01,866 INFO L226 Difference]: Without dead ends: 6313 [2022-11-16 11:56:01,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 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 11:56:01,868 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 92 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:01,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 8 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:56:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6313 states. [2022-11-16 11:56:01,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6313 to 6313. [2022-11-16 11:56:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6313 states, 6306 states have (on average 2.057722803679036) internal successors, (12976), 6312 states have internal predecessors, (12976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 12976 transitions. [2022-11-16 11:56:02,011 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 12976 transitions. Word has length 37 [2022-11-16 11:56:02,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:02,012 INFO L495 AbstractCegarLoop]: Abstraction has 6313 states and 12976 transitions. [2022-11-16 11:56:02,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 12976 transitions. [2022-11-16 11:56:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:56:02,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:02,016 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:02,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 11:56:02,223 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:56:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1569088064, now seen corresponding path program 2 times [2022-11-16 11:56:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160728312] [2022-11-16 11:56:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:02,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:02,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:02,528 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:02,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160728312] [2022-11-16 11:56:02,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160728312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:02,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511370359] [2022-11-16 11:56:02,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:56:02,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:02,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:02,531 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:02,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 11:56:02,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:56:02,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:02,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:56:02,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:02,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511370359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2022-11-16 11:56:03,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125704407] [2022-11-16 11:56:03,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:03,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:56:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:56:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:56:03,034 INFO L87 Difference]: Start difference. First operand 6313 states and 12976 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:03,839 INFO L93 Difference]: Finished difference Result 8779 states and 17969 transitions. [2022-11-16 11:56:03,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:56:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-11-16 11:56:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:03,854 INFO L225 Difference]: With dead ends: 8779 [2022-11-16 11:56:03,854 INFO L226 Difference]: Without dead ends: 8779 [2022-11-16 11:56:03,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=770, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:56:03,855 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 225 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:03,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 0 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:56:03,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8779 states. [2022-11-16 11:56:04,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8779 to 6609. [2022-11-16 11:56:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6602 states have (on average 2.0661920630112087) internal successors, (13641), 6608 states have internal predecessors, (13641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 13641 transitions. [2022-11-16 11:56:04,035 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 13641 transitions. Word has length 38 [2022-11-16 11:56:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:04,035 INFO L495 AbstractCegarLoop]: Abstraction has 6609 states and 13641 transitions. [2022-11-16 11:56:04,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 13641 transitions. [2022-11-16 11:56:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:56:04,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:04,041 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2022-11-16 11:56:04,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-16 11:56:04,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 11:56:04,248 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:56:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:04,249 INFO L85 PathProgramCache]: Analyzing trace with hash 914472058, now seen corresponding path program 3 times [2022-11-16 11:56:04,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:04,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150858227] [2022-11-16 11:56:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 56 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:04,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150858227] [2022-11-16 11:56:04,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150858227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:04,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271747144] [2022-11-16 11:56:04,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:56:04,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:04,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:04,407 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:04,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 11:56:04,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-16 11:56:04,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:04,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:56:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:04,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:56:04,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271747144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:04,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:56:04,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2022-11-16 11:56:04,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527455610] [2022-11-16 11:56:04,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:04,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:56:04,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:04,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:56:04,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:56:04,875 INFO L87 Difference]: Start difference. First operand 6609 states and 13641 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:05,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:05,303 INFO L93 Difference]: Finished difference Result 7591 states and 15809 transitions. [2022-11-16 11:56:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:56:05,304 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 11:56:05,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:05,316 INFO L225 Difference]: With dead ends: 7591 [2022-11-16 11:56:05,316 INFO L226 Difference]: Without dead ends: 7477 [2022-11-16 11:56:05,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:56:05,317 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 116 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:05,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 15 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:56:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7477 states. [2022-11-16 11:56:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7477 to 4641. [2022-11-16 11:56:05,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4634 states have (on average 2.0360379801467414) internal successors, (9435), 4640 states have internal predecessors, (9435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 9435 transitions. [2022-11-16 11:56:05,425 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 9435 transitions. Word has length 41 [2022-11-16 11:56:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:05,425 INFO L495 AbstractCegarLoop]: Abstraction has 4641 states and 9435 transitions. [2022-11-16 11:56:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 9435 transitions. [2022-11-16 11:56:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:56:05,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:05,431 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:05,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-16 11:56:05,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 11:56:05,644 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:56:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1824416907, now seen corresponding path program 7 times [2022-11-16 11:56:05,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:05,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336828823] [2022-11-16 11:56:05,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:07,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:07,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336828823] [2022-11-16 11:56:07,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336828823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:07,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127610332] [2022-11-16 11:56:07,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:56:07,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:07,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:07,984 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:07,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 11:56:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:08,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 11:56:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:08,253 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 11:56:08,253 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 20 treesize of output 22 [2022-11-16 11:56:08,869 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 19 treesize of output 15 [2022-11-16 11:56:08,997 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 56 treesize of output 52 [2022-11-16 11:56:09,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:09,722 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 57 treesize of output 38 [2022-11-16 11:56:11,075 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 76 treesize of output 44 [2022-11-16 11:56:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:11,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:13,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:13,218 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 11:56:13,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:13,233 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 11:56:13,239 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 11:56:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:13,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127610332] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:13,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:13,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 19] total 64 [2022-11-16 11:56:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011442614] [2022-11-16 11:56:13,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:13,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-16 11:56:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:13,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-16 11:56:13,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4068, Unknown=6, NotChecked=0, Total=4290 [2022-11-16 11:56:13,755 INFO L87 Difference]: Start difference. First operand 4641 states and 9435 transitions. Second operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:15,706 INFO L93 Difference]: Finished difference Result 19283 states and 37685 transitions. [2022-11-16 11:57:15,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2022-11-16 11:57:15,706 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 11:57:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:15,751 INFO L225 Difference]: With dead ends: 19283 [2022-11-16 11:57:15,752 INFO L226 Difference]: Without dead ends: 19283 [2022-11-16 11:57:15,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 60 SyntacticMatches, 27 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 36453 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=6237, Invalid=84556, Unknown=109, NotChecked=0, Total=90902 [2022-11-16 11:57:15,759 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1692 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 14914 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1692 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 19607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 14914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4599 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:15,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1692 Valid, 1 Invalid, 19607 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [94 Valid, 14914 Invalid, 0 Unknown, 4599 Unchecked, 16.7s Time] [2022-11-16 11:57:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19283 states. [2022-11-16 11:57:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19283 to 5908. [2022-11-16 11:57:16,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5908 states, 5901 states have (on average 2.047110659210303) internal successors, (12080), 5907 states have internal predecessors, (12080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:16,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5908 states to 5908 states and 12080 transitions. [2022-11-16 11:57:16,047 INFO L78 Accepts]: Start accepts. Automaton has 5908 states and 12080 transitions. Word has length 43 [2022-11-16 11:57:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:16,047 INFO L495 AbstractCegarLoop]: Abstraction has 5908 states and 12080 transitions. [2022-11-16 11:57:16,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5908 states and 12080 transitions. [2022-11-16 11:57:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:57:16,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:16,053 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:16,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-16 11:57:16,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:16,261 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:57:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -116260059, now seen corresponding path program 3 times [2022-11-16 11:57:16,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:16,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589739243] [2022-11-16 11:57:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:16,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:16,683 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:16,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:16,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589739243] [2022-11-16 11:57:16,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589739243] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:16,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609562008] [2022-11-16 11:57:16,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:16,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:16,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:16,685 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:16,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 11:57:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:57:17,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:17,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:57:17,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:17,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 43 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:17,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609562008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:17,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:17,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 17 [2022-11-16 11:57:17,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547579467] [2022-11-16 11:57:17,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:17,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:57:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:57:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:57:17,345 INFO L87 Difference]: Start difference. First operand 5908 states and 12080 transitions. Second operand has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:18,017 INFO L93 Difference]: Finished difference Result 7182 states and 14666 transitions. [2022-11-16 11:57:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:57:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-11-16 11:57:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:18,029 INFO L225 Difference]: With dead ends: 7182 [2022-11-16 11:57:18,030 INFO L226 Difference]: Without dead ends: 7182 [2022-11-16 11:57:18,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:57:18,030 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 226 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:18,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 0 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:57:18,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7182 states. [2022-11-16 11:57:18,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7182 to 5419. [2022-11-16 11:57:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5419 states, 5414 states have (on average 2.065016623568526) internal successors, (11180), 5418 states have internal predecessors, (11180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5419 states to 5419 states and 11180 transitions. [2022-11-16 11:57:18,214 INFO L78 Accepts]: Start accepts. Automaton has 5419 states and 11180 transitions. Word has length 45 [2022-11-16 11:57:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:18,214 INFO L495 AbstractCegarLoop]: Abstraction has 5419 states and 11180 transitions. [2022-11-16 11:57:18,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.333333333333333) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:18,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5419 states and 11180 transitions. [2022-11-16 11:57:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:57:18,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:18,220 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:18,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:18,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:18,427 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:57:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:18,428 INFO L85 PathProgramCache]: Analyzing trace with hash -116264850, now seen corresponding path program 3 times [2022-11-16 11:57:18,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:18,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241531867] [2022-11-16 11:57:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:18,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:20,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:20,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241531867] [2022-11-16 11:57:20,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241531867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38882702] [2022-11-16 11:57:20,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:57:20,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:20,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:20,140 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:20,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 11:57:20,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:57:20,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:20,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 11:57:20,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:20,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:20,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:20,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:20,400 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 11:57:20,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:20,493 INFO L321 Elim1Store]: treesize reduction 48, result has 46.1 percent of original size [2022-11-16 11:57:20,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 17 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 11 case distinctions, treesize of input 45 treesize of output 69 [2022-11-16 11:57:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:57:22,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:57:24,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38882702] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:24,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:24,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 43 [2022-11-16 11:57:24,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179237804] [2022-11-16 11:57:24,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:24,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 11:57:24,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 11:57:24,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1824, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 11:57:24,182 INFO L87 Difference]: Start difference. First operand 5419 states and 11180 transitions. Second operand has 45 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 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) [2022-11-16 11:57:59,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:59,573 INFO L93 Difference]: Finished difference Result 16931 states and 33022 transitions. [2022-11-16 11:57:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-11-16 11:57:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 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) Word has length 45 [2022-11-16 11:57:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:59,657 INFO L225 Difference]: With dead ends: 16931 [2022-11-16 11:57:59,657 INFO L226 Difference]: Without dead ends: 16931 [2022-11-16 11:57:59,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 78 SyntacticMatches, 99 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23353 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=3957, Invalid=33099, Unknown=0, NotChecked=0, Total=37056 [2022-11-16 11:57:59,659 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2310 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 5809 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2183 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:59,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2310 Valid, 11 Invalid, 8099 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [107 Valid, 5809 Invalid, 0 Unknown, 2183 Unchecked, 6.1s Time] [2022-11-16 11:57:59,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16931 states. [2022-11-16 11:57:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16931 to 7366. [2022-11-16 11:57:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7366 states, 7361 states have (on average 2.0349137345469366) internal successors, (14979), 7365 states have internal predecessors, (14979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 14979 transitions. [2022-11-16 11:57:59,963 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 14979 transitions. Word has length 45 [2022-11-16 11:57:59,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:59,964 INFO L495 AbstractCegarLoop]: Abstraction has 7366 states and 14979 transitions. [2022-11-16 11:57:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.4318181818181817) internal successors, (107), 44 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) [2022-11-16 11:57:59,964 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 14979 transitions. [2022-11-16 11:57:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:57:59,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:59,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:59,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:00,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:00,179 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:58:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1457693904, now seen corresponding path program 1 times [2022-11-16 11:58:00,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:00,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652663285] [2022-11-16 11:58:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:00,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:58:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652663285] [2022-11-16 11:58:01,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652663285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136529007] [2022-11-16 11:58:01,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:01,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:01,662 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:01,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-16 11:58:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:01,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 11:58:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:01,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:01,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:01,992 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 11:58:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:58:02,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:58:03,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136529007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:03,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:03,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 9] total 39 [2022-11-16 11:58:03,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608360490] [2022-11-16 11:58:03,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:03,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:58:03,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:58:03,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 11:58:03,582 INFO L87 Difference]: Start difference. First operand 7366 states and 14979 transitions. Second operand has 41 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:07,991 INFO L93 Difference]: Finished difference Result 10156 states and 20510 transitions. [2022-11-16 11:58:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:58:07,992 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 11:58:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:08,008 INFO L225 Difference]: With dead ends: 10156 [2022-11-16 11:58:08,009 INFO L226 Difference]: Without dead ends: 10156 [2022-11-16 11:58:08,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=418, Invalid=3488, Unknown=0, NotChecked=0, Total=3906 [2022-11-16 11:58:08,010 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 470 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3475 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:08,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 0 Invalid, 3490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3475 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 11:58:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10156 states. [2022-11-16 11:58:08,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10156 to 7361. [2022-11-16 11:58:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7361 states, 7356 states have (on average 2.032626427406199) internal successors, (14952), 7360 states have internal predecessors, (14952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:08,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7361 states to 7361 states and 14952 transitions. [2022-11-16 11:58:08,189 INFO L78 Accepts]: Start accepts. Automaton has 7361 states and 14952 transitions. Word has length 46 [2022-11-16 11:58:08,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:08,190 INFO L495 AbstractCegarLoop]: Abstraction has 7361 states and 14952 transitions. [2022-11-16 11:58:08,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:08,190 INFO L276 IsEmpty]: Start isEmpty. Operand 7361 states and 14952 transitions. [2022-11-16 11:58:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:58:08,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:08,198 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:08,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:08,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:08,405 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:58:08,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:08,406 INFO L85 PathProgramCache]: Analyzing trace with hash -600228734, now seen corresponding path program 2 times [2022-11-16 11:58:08,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:08,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636249652] [2022-11-16 11:58:08,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:08,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:58:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:09,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636249652] [2022-11-16 11:58:09,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636249652] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:09,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829528113] [2022-11-16 11:58:09,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:09,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:09,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:09,969 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:09,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-16 11:58:10,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:58:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:10,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-16 11:58:10,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:10,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:10,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:10,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:10,343 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 11:58:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:58:11,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:58:11,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829528113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:11,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:11,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 38 [2022-11-16 11:58:11,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34610001] [2022-11-16 11:58:11,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:11,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:58:11,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:11,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:58:11,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1419, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 11:58:11,913 INFO L87 Difference]: Start difference. First operand 7361 states and 14952 transitions. Second operand has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:16,052 INFO L93 Difference]: Finished difference Result 9836 states and 19995 transitions. [2022-11-16 11:58:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 11:58:16,052 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-16 11:58:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:16,072 INFO L225 Difference]: With dead ends: 9836 [2022-11-16 11:58:16,072 INFO L226 Difference]: Without dead ends: 9836 [2022-11-16 11:58:16,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=355, Invalid=2951, Unknown=0, NotChecked=0, Total=3306 [2022-11-16 11:58:16,073 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3403 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:16,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 0 Invalid, 3419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3403 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-16 11:58:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2022-11-16 11:58:16,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 7282. [2022-11-16 11:58:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7282 states, 7277 states have (on average 2.032568366084925) internal successors, (14791), 7281 states have internal predecessors, (14791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7282 states to 7282 states and 14791 transitions. [2022-11-16 11:58:16,302 INFO L78 Accepts]: Start accepts. Automaton has 7282 states and 14791 transitions. Word has length 46 [2022-11-16 11:58:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:16,302 INFO L495 AbstractCegarLoop]: Abstraction has 7282 states and 14791 transitions. [2022-11-16 11:58:16,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7282 states and 14791 transitions. [2022-11-16 11:58:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-16 11:58:16,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:16,307 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:16,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:16,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 11:58:16,508 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:58:16,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -853237536, now seen corresponding path program 3 times [2022-11-16 11:58:16,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570635816] [2022-11-16 11:58:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:16,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:58:17,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570635816] [2022-11-16 11:58:17,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570635816] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921545782] [2022-11-16 11:58:17,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:58:17,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:17,109 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:17,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-16 11:58:17,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:58:17,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:17,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-16 11:58:17,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:17,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:17,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:17,440 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 11:58:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:58:18,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:58:19,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921545782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:19,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:19,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 38 [2022-11-16 11:58:19,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486051031] [2022-11-16 11:58:19,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:19,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:58:19,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:19,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:58:19,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 11:58:19,732 INFO L87 Difference]: Start difference. First operand 7282 states and 14791 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:58:21,925 INFO L93 Difference]: Finished difference Result 7686 states and 15469 transitions. [2022-11-16 11:58:21,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:58:21,926 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-16 11:58:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:58:21,938 INFO L225 Difference]: With dead ends: 7686 [2022-11-16 11:58:21,938 INFO L226 Difference]: Without dead ends: 7686 [2022-11-16 11:58:21,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=561, Invalid=2301, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 11:58:21,939 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 799 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:58:21,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [799 Valid, 0 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:58:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7686 states. [2022-11-16 11:58:22,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7686 to 4305. [2022-11-16 11:58:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4305 states, 4302 states have (on average 2.0346350534635054) internal successors, (8753), 4304 states have internal predecessors, (8753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4305 states to 4305 states and 8753 transitions. [2022-11-16 11:58:22,030 INFO L78 Accepts]: Start accepts. Automaton has 4305 states and 8753 transitions. Word has length 47 [2022-11-16 11:58:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:58:22,030 INFO L495 AbstractCegarLoop]: Abstraction has 4305 states and 8753 transitions. [2022-11-16 11:58:22,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 39 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:58:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 4305 states and 8753 transitions. [2022-11-16 11:58:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 11:58:22,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:58:22,037 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:58:22,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:58:22,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:22,241 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:58:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:58:22,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1697024790, now seen corresponding path program 8 times [2022-11-16 11:58:22,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:58:22,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059401517] [2022-11-16 11:58:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:58:22,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:58:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:58:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:25,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:58:25,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059401517] [2022-11-16 11:58:25,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059401517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:58:25,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260329500] [2022-11-16 11:58:25,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:58:25,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:58:25,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:58:25,536 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:58:25,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-16 11:58:25,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:58:25,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:58:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 11:58:25,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:58:25,903 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-16 11:58:25,904 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 20 treesize of output 22 [2022-11-16 11:58:26,800 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 19 treesize of output 15 [2022-11-16 11:58:26,946 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 56 treesize of output 52 [2022-11-16 11:58:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:58:27,804 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 57 treesize of output 38 [2022-11-16 11:58:29,380 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 76 treesize of output 44 [2022-11-16 11:58:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:29,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:58:32,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:58:32,028 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 11:58:32,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:58:32,041 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 11:58:32,046 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 11:58:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:58:32,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260329500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:32,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:32,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 19] total 72 [2022-11-16 11:58:32,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209130943] [2022-11-16 11:58:32,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:32,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-16 11:58:32,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:32,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-16 11:58:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5169, Unknown=9, NotChecked=0, Total=5402 [2022-11-16 11:58:32,673 INFO L87 Difference]: Start difference. First operand 4305 states and 8753 transitions. Second operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:55,733 INFO L93 Difference]: Finished difference Result 17218 states and 33277 transitions. [2022-11-16 11:59:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-11-16 11:59:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-11-16 11:59:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:55,760 INFO L225 Difference]: With dead ends: 17218 [2022-11-16 11:59:55,760 INFO L226 Difference]: Without dead ends: 17218 [2022-11-16 11:59:55,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 63 SyntacticMatches, 52 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 36955 ImplicationChecksByTransitivity, 72.7s TimeCoverageRelationStatistics Valid=5663, Invalid=84004, Unknown=33, NotChecked=0, Total=89700 [2022-11-16 11:59:55,766 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1498 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14241 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 20383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 14241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6075 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:55,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 2 Invalid, 20383 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 14241 Invalid, 0 Unknown, 6075 Unchecked, 16.1s Time] [2022-11-16 11:59:55,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17218 states. [2022-11-16 11:59:56,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17218 to 5791. [2022-11-16 11:59:56,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5788 states have (on average 2.0414651002073256) internal successors, (11816), 5790 states have internal predecessors, (11816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:56,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 11816 transitions. [2022-11-16 11:59:56,015 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 11816 transitions. Word has length 50 [2022-11-16 11:59:56,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:56,016 INFO L495 AbstractCegarLoop]: Abstraction has 5791 states and 11816 transitions. [2022-11-16 11:59:56,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 73 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:56,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 11816 transitions. [2022-11-16 11:59:56,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 11:59:56,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:56,021 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:56,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-16 11:59:56,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-16 11:59:56,222 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 11:59:56,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:56,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1467066878, now seen corresponding path program 9 times [2022-11-16 11:59:56,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:56,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606918409] [2022-11-16 11:59:56,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:56,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:58,145 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606918409] [2022-11-16 11:59:58,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606918409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:58,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312974515] [2022-11-16 11:59:58,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:59:58,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:58,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:58,148 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:58,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-16 11:59:58,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:59:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-16 11:59:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:58,832 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 19 treesize of output 15 [2022-11-16 11:59:59,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:59,367 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 69 treesize of output 41 [2022-11-16 11:59:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:59,882 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 69 treesize of output 41 [2022-11-16 12:00:01,162 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 108 treesize of output 44 [2022-11-16 12:00:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:01,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:03,966 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 12:00:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:04,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312974515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:04,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:04,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 71 [2022-11-16 12:00:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159073498] [2022-11-16 12:00:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:04,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-16 12:00:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-16 12:00:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=4870, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 12:00:04,317 INFO L87 Difference]: Start difference. First operand 5791 states and 11816 transitions. Second operand has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:54,593 INFO L93 Difference]: Finished difference Result 26322 states and 50424 transitions. [2022-11-16 12:02:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 410 states. [2022-11-16 12:02:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-16 12:02:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:54,636 INFO L225 Difference]: With dead ends: 26322 [2022-11-16 12:02:54,636 INFO L226 Difference]: Without dead ends: 26322 [2022-11-16 12:02:54,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 722 GetRequests, 131 SyntacticMatches, 114 SemanticMatches, 477 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116428 ImplicationChecksByTransitivity, 155.5s TimeCoverageRelationStatistics Valid=16316, Invalid=212646, Unknown=0, NotChecked=0, Total=228962 [2022-11-16 12:02:54,645 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3290 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13095 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3290 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 15166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 13095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1904 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:54,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3290 Valid, 2 Invalid, 15166 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [167 Valid, 13095 Invalid, 0 Unknown, 1904 Unchecked, 18.4s Time] [2022-11-16 12:02:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26322 states. [2022-11-16 12:02:54,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26322 to 10189. [2022-11-16 12:02:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10189 states, 10186 states have (on average 2.0211074023169058) internal successors, (20587), 10188 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10189 states to 10189 states and 20587 transitions. [2022-11-16 12:02:54,936 INFO L78 Accepts]: Start accepts. Automaton has 10189 states and 20587 transitions. Word has length 51 [2022-11-16 12:02:54,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:54,936 INFO L495 AbstractCegarLoop]: Abstraction has 10189 states and 20587 transitions. [2022-11-16 12:02:54,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 2.1549295774647885) internal successors, (153), 72 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 10189 states and 20587 transitions. [2022-11-16 12:02:54,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:02:54,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:54,945 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:54,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:55,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:02:55,146 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:02:55,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash 686333684, now seen corresponding path program 10 times [2022-11-16 12:02:55,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:55,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180566723] [2022-11-16 12:02:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:57,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180566723] [2022-11-16 12:02:57,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180566723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:57,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708731061] [2022-11-16 12:02:57,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:02:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:57,674 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:57,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-16 12:02:57,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:02:57,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:57,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-16 12:02:57,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:57,985 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:02:57,985 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 12:02:58,351 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 19 treesize of output 15 [2022-11-16 12:02:58,452 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 56 treesize of output 52 [2022-11-16 12:02:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:02:59,042 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 49 treesize of output 36 [2022-11-16 12:02:59,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:02:59,541 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 49 treesize of output 36 [2022-11-16 12:03:01,020 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 76 treesize of output 44 [2022-11-16 12:03:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:01,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:03,847 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:03,849 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 12:03:03,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:03,862 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 12:03:03,867 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 12:03:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:04,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708731061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:04,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:04,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 24] total 77 [2022-11-16 12:03:04,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997573428] [2022-11-16 12:03:04,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:04,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-11-16 12:03:04,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-11-16 12:03:04,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=5786, Unknown=4, NotChecked=0, Total=6162 [2022-11-16 12:03:04,358 INFO L87 Difference]: Start difference. First operand 10189 states and 20587 transitions. Second operand has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:03:35,397 INFO L93 Difference]: Finished difference Result 27463 states and 53140 transitions. [2022-11-16 12:03:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-16 12:03:35,398 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-16 12:03:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:03:35,451 INFO L225 Difference]: With dead ends: 27463 [2022-11-16 12:03:35,451 INFO L226 Difference]: Without dead ends: 27463 [2022-11-16 12:03:35,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9740 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=2612, Invalid=29603, Unknown=5, NotChecked=0, Total=32220 [2022-11-16 12:03:35,453 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1545 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10539 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 12269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 10539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1632 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:03:35,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 0 Invalid, 12269 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [98 Valid, 10539 Invalid, 0 Unknown, 1632 Unchecked, 11.9s Time] [2022-11-16 12:03:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27463 states. [2022-11-16 12:03:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27463 to 13090. [2022-11-16 12:03:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13090 states, 13087 states have (on average 2.019255749980897) internal successors, (26426), 13089 states have internal predecessors, (26426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 26426 transitions. [2022-11-16 12:03:35,836 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 26426 transitions. Word has length 51 [2022-11-16 12:03:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:03:35,836 INFO L495 AbstractCegarLoop]: Abstraction has 13090 states and 26426 transitions. [2022-11-16 12:03:35,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 26426 transitions. [2022-11-16 12:03:35,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:03:35,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:03:35,851 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:35,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:36,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-16 12:03:36,052 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-16 12:03:36,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1991830692, now seen corresponding path program 11 times [2022-11-16 12:03:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:36,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622737840] [2022-11-16 12:03:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622737840] [2022-11-16 12:03:39,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622737840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:39,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124719556] [2022-11-16 12:03:39,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:39,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:39,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:39,330 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:39,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b567938d-63c5-4f8c-bdeb-fc5b96bc63e2/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-16 12:03:39,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:03:39,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-16 12:03:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:39,804 INFO L321 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2022-11-16 12:03:39,805 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 12:03:40,341 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 19 treesize of output 15 [2022-11-16 12:03:40,475 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 56 treesize of output 52 [2022-11-16 12:03:41,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:41,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-16 12:03:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:03:41,854 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 49 treesize of output 36 [2022-11-16 12:03:43,651 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 76 treesize of output 44 [2022-11-16 12:03:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:43,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:47,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:47,274 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 12:03:47,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:47,290 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 12:03:47,296 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 12:03:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:48,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124719556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:48,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:48,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 24] total 76 [2022-11-16 12:03:48,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817273036] [2022-11-16 12:03:48,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:48,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-16 12:03:48,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:48,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-16 12:03:48,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=5654, Unknown=0, NotChecked=0, Total=6006 [2022-11-16 12:03:48,032 INFO L87 Difference]: Start difference. First operand 13090 states and 26426 transitions. Second operand has 78 states, 77 states have (on average 1.9870129870129871) internal successors, (153), 77 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)