./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/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_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/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_155640da-e8a7-446d-8339-9d205e91a0eb/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 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 --- 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 11:15:19,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:15:19,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:15:19,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:15:19,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:15:19,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:15:19,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:15:19,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:15:19,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:15:19,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:15:19,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:15:19,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:15:19,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:15:19,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:15:19,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:15:20,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:15:20,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:15:20,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:15:20,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:15:20,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:15:20,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:15:20,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:15:20,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:15:20,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:15:20,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:15:20,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:15:20,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:15:20,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:15:20,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:15:20,036 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:15:20,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:15:20,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:15:20,039 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:15:20,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:15:20,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:15:20,042 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:15:20,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:15:20,043 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:15:20,043 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:15:20,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:15:20,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:15:20,046 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:15:20,085 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:15:20,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:15:20,086 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:15:20,086 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:15:20,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:15:20,087 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:15:20,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:15:20,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:15:20,088 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:15:20,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:15:20,090 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:15:20,090 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:15:20,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:15:20,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:15:20,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:15:20,091 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:15:20,091 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:15:20,092 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:15:20,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:15:20,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:15:20,093 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:15:20,093 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:15:20,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:15:20,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:15:20,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:15:20,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:15:20,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:15:20,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:15:20,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:15:20,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:15:20,095 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_155640da-e8a7-446d-8339-9d205e91a0eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a7db49c8892594e32a30fa9165fc3ad1a94911917cd8b63757bb8f24f04b536 [2022-11-16 11:15:20,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:15:20,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:15:20,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:15:20,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:15:20,420 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:15:20,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-16 11:15:20,497 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/data/ac989df88/a6e6c3ab38c2427fa96ab55eeb815f7e/FLAG1c3aac978 [2022-11-16 11:15:21,128 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:15:21,128 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2022-11-16 11:15:21,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/data/ac989df88/a6e6c3ab38c2427fa96ab55eeb815f7e/FLAG1c3aac978 [2022-11-16 11:15:21,349 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/data/ac989df88/a6e6c3ab38c2427fa96ab55eeb815f7e [2022-11-16 11:15:21,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:15:21,355 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:15:21,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:15:21,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:15:21,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:15:21,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:15:21" (1/1) ... [2022-11-16 11:15:21,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161d1a50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:21, skipping insertion in model container [2022-11-16 11:15:21,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:15:21" (1/1) ... [2022-11-16 11:15:21,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:15:21,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:15:21,987 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_155640da-e8a7-446d-8339-9d205e91a0eb/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-16 11:15:22,012 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:15:22,025 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:15:22,059 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_155640da-e8a7-446d-8339-9d205e91a0eb/sv-benchmarks/c/goblint-regression/28-race_reach_74-tricky_address1_racefree.i[41323,41336] [2022-11-16 11:15:22,071 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:15:22,136 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:15:22,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22 WrapperNode [2022-11-16 11:15:22,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:15:22,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:15:22,138 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:15:22,138 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:15:22,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,165 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,191 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-16 11:15:22,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:15:22,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:15:22,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:15:22,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:15:22,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,221 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,222 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:15:22,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:15:22,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:15:22,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:15:22,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (1/1) ... [2022-11-16 11:15:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:15:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:22,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:15:22,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:15:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:15:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:15:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:15:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:15:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:15:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:15:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 11:15:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 11:15:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:15:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:15:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:15:22,307 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 11:15:22,485 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:15:22,501 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:15:22,968 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:15:22,984 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:15:22,984 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-16 11:15:22,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:15:22 BoogieIcfgContainer [2022-11-16 11:15:22,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:15:22,993 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:15:22,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:15:22,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:15:22,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:15:21" (1/3) ... [2022-11-16 11:15:22,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@face05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:15:22, skipping insertion in model container [2022-11-16 11:15:22,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:15:22" (2/3) ... [2022-11-16 11:15:22,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@face05c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:15:22, skipping insertion in model container [2022-11-16 11:15:23,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:15:22" (3/3) ... [2022-11-16 11:15:23,001 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2022-11-16 11:15:23,020 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:15:23,020 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-16 11:15:23,021 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:15:23,113 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 11:15:23,153 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:15:23,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-16 11:15:23,187 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-16 11:15:23,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-11-16 11:15:23,335 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-11-16 11:15:23,336 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-16 11:15:23,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1213 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-11-16 11:15:23,357 INFO L119 LiptonReduction]: Number of co-enabled transitions 15200 [2022-11-16 11:15:28,975 INFO L134 LiptonReduction]: Checked pairs total: 28984 [2022-11-16 11:15:28,975 INFO L136 LiptonReduction]: Total number of compositions: 221 [2022-11-16 11:15:28,983 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 93 transitions, 194 flow [2022-11-16 11:15:29,048 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:29,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:15:29,075 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;@dfefe3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:15:29,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-16 11:15:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:29,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:15:29,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:29,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:15:29,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash 894279, now seen corresponding path program 1 times [2022-11-16 11:15:29,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:29,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288269315] [2022-11-16 11:15:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:29,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:29,407 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 11:15:29,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:29,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288269315] [2022-11-16 11:15:29,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288269315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:29,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:29,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274340052] [2022-11-16 11:15:29,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:29,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:29,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:29,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:29,441 INFO L87 Difference]: Start difference. First operand has 1102 states, 858 states have (on average 3.3426573426573425) internal successors, (2868), 1101 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) 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 11:15:29,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:29,627 INFO L93 Difference]: Finished difference Result 919 states and 1806 transitions. [2022-11-16 11:15:29,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:29,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 11:15:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:29,656 INFO L225 Difference]: With dead ends: 919 [2022-11-16 11:15:29,656 INFO L226 Difference]: Without dead ends: 913 [2022-11-16 11:15:29,657 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 11:15:29,667 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:29,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-11-16 11:15:29,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2022-11-16 11:15:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 753 states have (on average 2.3824701195219125) internal successors, (1794), 912 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1794 transitions. [2022-11-16 11:15:29,774 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1794 transitions. Word has length 3 [2022-11-16 11:15:29,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:29,774 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1794 transitions. [2022-11-16 11:15:29,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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 11:15:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1794 transitions. [2022-11-16 11:15:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:15:29,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:29,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:15:29,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:15:29,776 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:29,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:29,777 INFO L85 PathProgramCache]: Analyzing trace with hash 27690803, now seen corresponding path program 1 times [2022-11-16 11:15:29,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:29,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517213141] [2022-11-16 11:15:29,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:29,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:29,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:29,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517213141] [2022-11-16 11:15:29,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517213141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:29,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159885024] [2022-11-16 11:15:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:29,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:29,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:29,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:29,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:15:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:29,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:15:29,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:30,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:30,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:30,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159885024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:30,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:30,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 11:15:30,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313814401] [2022-11-16 11:15:30,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:30,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:15:30,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:30,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:15:30,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:15:30,093 INFO L87 Difference]: Start difference. First operand 913 states and 1794 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:30,296 INFO L93 Difference]: Finished difference Result 916 states and 1797 transitions. [2022-11-16 11:15:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:15:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:15:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:30,302 INFO L225 Difference]: With dead ends: 916 [2022-11-16 11:15:30,302 INFO L226 Difference]: Without dead ends: 916 [2022-11-16 11:15:30,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 11:15:30,304 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:30,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:15:30,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-11-16 11:15:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2022-11-16 11:15:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 756 states have (on average 2.376984126984127) internal successors, (1797), 915 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1797 transitions. [2022-11-16 11:15:30,335 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1797 transitions. Word has length 4 [2022-11-16 11:15:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:30,336 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1797 transitions. [2022-11-16 11:15:30,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1797 transitions. [2022-11-16 11:15:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:30,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:30,337 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-16 11:15:30,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:30,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:30,543 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash 271368263, now seen corresponding path program 2 times [2022-11-16 11:15:30,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:30,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539562530] [2022-11-16 11:15:30,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:30,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:30,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539562530] [2022-11-16 11:15:30,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539562530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:30,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473373416] [2022-11-16 11:15:30,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:30,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:30,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:30,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:30,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:15:30,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:15:30,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:30,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:15:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:30,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:15:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:15:30,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:30,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473373416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:30,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:15:30,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-16 11:15:30,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565965312] [2022-11-16 11:15:30,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:30,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:30,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:30,917 INFO L87 Difference]: Start difference. First operand 916 states and 1797 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:31,104 INFO L93 Difference]: Finished difference Result 893 states and 1772 transitions. [2022-11-16 11:15:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:15:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:31,114 INFO L225 Difference]: With dead ends: 893 [2022-11-16 11:15:31,115 INFO L226 Difference]: Without dead ends: 893 [2022-11-16 11:15:31,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:31,116 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:31,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:15:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-11-16 11:15:31,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-11-16 11:15:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 741 states have (on average 2.3913630229419702) internal successors, (1772), 892 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1772 transitions. [2022-11-16 11:15:31,156 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1772 transitions. Word has length 7 [2022-11-16 11:15:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:31,156 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 1772 transitions. [2022-11-16 11:15:31,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1772 transitions. [2022-11-16 11:15:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:31,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:31,157 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-16 11:15:31,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:31,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:31,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:31,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:31,358 INFO L85 PathProgramCache]: Analyzing trace with hash 271368264, now seen corresponding path program 1 times [2022-11-16 11:15:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224687180] [2022-11-16 11:15:31,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:31,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:15:31,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:31,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224687180] [2022-11-16 11:15:31,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224687180] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:31,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:31,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:31,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650777599] [2022-11-16 11:15:31,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:31,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:31,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:31,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:31,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:31,425 INFO L87 Difference]: Start difference. First operand 893 states and 1772 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:31,546 INFO L93 Difference]: Finished difference Result 839 states and 1666 transitions. [2022-11-16 11:15:31,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:15:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:31,551 INFO L225 Difference]: With dead ends: 839 [2022-11-16 11:15:31,552 INFO L226 Difference]: Without dead ends: 839 [2022-11-16 11:15:31,552 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 11:15:31,553 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:31,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-16 11:15:31,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2022-11-16 11:15:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 709 states have (on average 2.3497884344146684) internal successors, (1666), 838 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1666 transitions. [2022-11-16 11:15:31,578 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1666 transitions. Word has length 7 [2022-11-16 11:15:31,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:31,578 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 1666 transitions. [2022-11-16 11:15:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:31,579 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1666 transitions. [2022-11-16 11:15:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:15:31,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:31,579 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:31,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:15:31,580 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1204186657, now seen corresponding path program 1 times [2022-11-16 11:15:31,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:31,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672781487] [2022-11-16 11:15:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:31,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:31,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:15:31,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:31,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672781487] [2022-11-16 11:15:31,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672781487] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:31,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739962940] [2022-11-16 11:15:31,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:31,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:31,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:31,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:31,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:15:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:31,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:15:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:15:31,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:15:31,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739962940] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:31,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:31,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 11:15:31,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173605831] [2022-11-16 11:15:31,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:31,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:15:31,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:15:31,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:15:31,902 INFO L87 Difference]: Start difference. First operand 839 states and 1666 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:32,068 INFO L93 Difference]: Finished difference Result 845 states and 1672 transitions. [2022-11-16 11:15:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:15:32,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 11:15:32,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:32,074 INFO L225 Difference]: With dead ends: 845 [2022-11-16 11:15:32,074 INFO L226 Difference]: Without dead ends: 845 [2022-11-16 11:15:32,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:15:32,075 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:32,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2022-11-16 11:15:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2022-11-16 11:15:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 715 states have (on average 2.3384615384615386) internal successors, (1672), 844 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1672 transitions. [2022-11-16 11:15:32,099 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1672 transitions. Word has length 10 [2022-11-16 11:15:32,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:32,100 INFO L495 AbstractCegarLoop]: Abstraction has 845 states and 1672 transitions. [2022-11-16 11:15:32,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,100 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1672 transitions. [2022-11-16 11:15:32,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:15:32,101 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:32,101 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:32,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:32,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:32,307 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:32,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:32,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1759427167, now seen corresponding path program 2 times [2022-11-16 11:15:32,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617416473] [2022-11-16 11:15:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:32,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617416473] [2022-11-16 11:15:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617416473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009500104] [2022-11-16 11:15:32,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:32,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:32,537 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:32,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:15:32,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:15:32,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:32,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:15:32,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:32,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:15:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:32,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:32,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009500104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:32,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:15:32,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-16 11:15:32,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918291750] [2022-11-16 11:15:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:32,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:15:32,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:32,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:15:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:32,710 INFO L87 Difference]: Start difference. First operand 845 states and 1672 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:32,865 INFO L93 Difference]: Finished difference Result 819 states and 1620 transitions. [2022-11-16 11:15:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:15:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:32,870 INFO L225 Difference]: With dead ends: 819 [2022-11-16 11:15:32,870 INFO L226 Difference]: Without dead ends: 819 [2022-11-16 11:15:32,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:32,871 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:32,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 33 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-11-16 11:15:32,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 819. [2022-11-16 11:15:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 699 states have (on average 2.3175965665236054) internal successors, (1620), 818 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1620 transitions. [2022-11-16 11:15:32,912 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1620 transitions. Word has length 16 [2022-11-16 11:15:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:32,913 INFO L495 AbstractCegarLoop]: Abstraction has 819 states and 1620 transitions. [2022-11-16 11:15:32,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1620 transitions. [2022-11-16 11:15:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:15:32,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:32,915 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-16 11:15:32,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:33,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:15:33,120 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-16 11:15:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1292333386, now seen corresponding path program 1 times [2022-11-16 11:15:33,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:33,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061133424] [2022-11-16 11:15:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:15:33,157 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:15:33,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:15:33,192 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:15:33,193 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:15:33,194 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-11-16 11:15:33,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-11-16 11:15:33,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-11-16 11:15:33,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-11-16 11:15:33,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-11-16 11:15:33,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-11-16 11:15:33,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-11-16 11:15:33,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-11-16 11:15:33,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-11-16 11:15:33,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-11-16 11:15:33,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-11-16 11:15:33,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (27 of 39 remaining) [2022-11-16 11:15:33,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-11-16 11:15:33,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-11-16 11:15:33,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-11-16 11:15:33,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-11-16 11:15:33,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-11-16 11:15:33,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-11-16 11:15:33,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-11-16 11:15:33,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-11-16 11:15:33,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-11-16 11:15:33,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-11-16 11:15:33,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-11-16 11:15:33,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-11-16 11:15:33,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-11-16 11:15:33,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-11-16 11:15:33,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-11-16 11:15:33,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-11-16 11:15:33,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-11-16 11:15:33,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-11-16 11:15:33,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-11-16 11:15:33,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-11-16 11:15:33,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-11-16 11:15:33,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-11-16 11:15:33,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-11-16 11:15:33,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-11-16 11:15:33,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-11-16 11:15:33,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-11-16 11:15:33,210 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-11-16 11:15:33,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:15:33,213 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-11-16 11:15:33,215 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:15:33,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 11:15:33,273 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:15:33,277 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:15:33,278 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-16 11:15:33,278 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-16 11:15:33,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-11-16 11:15:33,403 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-11-16 11:15:33,403 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-16 11:15:33,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2361 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-11-16 11:15:33,439 INFO L119 LiptonReduction]: Number of co-enabled transitions 44960 [2022-11-16 11:15:40,084 INFO L134 LiptonReduction]: Checked pairs total: 89493 [2022-11-16 11:15:40,085 INFO L136 LiptonReduction]: Total number of compositions: 296 [2022-11-16 11:15:40,086 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 105 places, 139 transitions, 296 flow [2022-11-16 11:15:41,624 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34230 states, 31226 states have (on average 4.364087619291616) internal successors, (136273), 34229 states have internal predecessors, (136273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:41,627 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:15:41,627 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;@dfefe3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:15:41,628 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-16 11:15:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand has 34230 states, 31226 states have (on average 4.364087619291616) internal successors, (136273), 34229 states have internal predecessors, (136273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:15:41,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:41,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:15:41,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:41,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1573338, now seen corresponding path program 1 times [2022-11-16 11:15:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:41,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129703745] [2022-11-16 11:15:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:41,731 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 11:15:41,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129703745] [2022-11-16 11:15:41,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129703745] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:41,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:41,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56893864] [2022-11-16 11:15:41,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:41,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:41,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:41,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:41,968 INFO L87 Difference]: Start difference. First operand has 34230 states, 31226 states have (on average 4.364087619291616) internal successors, (136273), 34229 states have internal predecessors, (136273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) 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 11:15:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:42,858 INFO L93 Difference]: Finished difference Result 26739 states and 79015 transitions. [2022-11-16 11:15:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 11:15:42,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:43,189 INFO L225 Difference]: With dead ends: 26739 [2022-11-16 11:15:43,189 INFO L226 Difference]: Without dead ends: 26690 [2022-11-16 11:15:43,189 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 11:15:43,191 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:43,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26690 states. [2022-11-16 11:15:44,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26690 to 26690. [2022-11-16 11:15:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26690 states, 25012 states have (on average 3.1532064608987684) internal successors, (78868), 26689 states have internal predecessors, (78868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26690 states to 26690 states and 78868 transitions. [2022-11-16 11:15:44,497 INFO L78 Accepts]: Start accepts. Automaton has 26690 states and 78868 transitions. Word has length 3 [2022-11-16 11:15:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:44,497 INFO L495 AbstractCegarLoop]: Abstraction has 26690 states and 78868 transitions. [2022-11-16 11:15:44,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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 11:15:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26690 states and 78868 transitions. [2022-11-16 11:15:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:15:44,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:44,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:15:44,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:15:44,499 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 48752672, now seen corresponding path program 1 times [2022-11-16 11:15:44,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:44,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989058698] [2022-11-16 11:15:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:44,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989058698] [2022-11-16 11:15:44,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989058698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:44,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798094447] [2022-11-16 11:15:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:44,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:44,532 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:15:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:44,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:15:44,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:44,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798094447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:44,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:44,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 11:15:44,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205207255] [2022-11-16 11:15:44,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:44,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:15:44,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:15:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:15:44,647 INFO L87 Difference]: Start difference. First operand 26690 states and 78868 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:45,142 INFO L93 Difference]: Finished difference Result 26693 states and 78871 transitions. [2022-11-16 11:15:45,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:15:45,143 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:15:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:45,297 INFO L225 Difference]: With dead ends: 26693 [2022-11-16 11:15:45,297 INFO L226 Difference]: Without dead ends: 26693 [2022-11-16 11:15:45,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 11:15:45,299 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:45,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:15:45,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26693 states. [2022-11-16 11:15:46,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26693 to 26693. [2022-11-16 11:15:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26693 states, 25015 states have (on average 3.1529482310613632) internal successors, (78871), 26692 states have internal predecessors, (78871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:46,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26693 states to 26693 states and 78871 transitions. [2022-11-16 11:15:46,526 INFO L78 Accepts]: Start accepts. Automaton has 26693 states and 78871 transitions. Word has length 4 [2022-11-16 11:15:46,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:46,526 INFO L495 AbstractCegarLoop]: Abstraction has 26693 states and 78871 transitions. [2022-11-16 11:15:46,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:46,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26693 states and 78871 transitions. [2022-11-16 11:15:46,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:46,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:46,527 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-16 11:15:46,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:46,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:46,727 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:46,728 INFO L85 PathProgramCache]: Analyzing trace with hash 671245146, now seen corresponding path program 2 times [2022-11-16 11:15:46,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:46,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884262532] [2022-11-16 11:15:46,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:46,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:46,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:46,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884262532] [2022-11-16 11:15:46,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884262532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:46,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264536829] [2022-11-16 11:15:46,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:15:46,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:46,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:46,806 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:46,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:15:46,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:15:46,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:15:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:15:46,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:46,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:15:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:15:46,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:15:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264536829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:46,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:15:46,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-16 11:15:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722991043] [2022-11-16 11:15:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:46,921 INFO L87 Difference]: Start difference. First operand 26693 states and 78871 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:47,362 INFO L93 Difference]: Finished difference Result 26670 states and 78846 transitions. [2022-11-16 11:15:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:15:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:47,500 INFO L225 Difference]: With dead ends: 26670 [2022-11-16 11:15:47,500 INFO L226 Difference]: Without dead ends: 26670 [2022-11-16 11:15:47,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:47,501 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:47,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:15:47,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26670 states. [2022-11-16 11:15:48,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26670 to 26670. [2022-11-16 11:15:48,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26670 states, 25000 states have (on average 3.15384) internal successors, (78846), 26669 states have internal predecessors, (78846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:48,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26670 states to 26670 states and 78846 transitions. [2022-11-16 11:15:48,604 INFO L78 Accepts]: Start accepts. Automaton has 26670 states and 78846 transitions. Word has length 7 [2022-11-16 11:15:48,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:48,604 INFO L495 AbstractCegarLoop]: Abstraction has 26670 states and 78846 transitions. [2022-11-16 11:15:48,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 26670 states and 78846 transitions. [2022-11-16 11:15:48,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:15:48,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:48,605 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-16 11:15:48,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:48,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:48,806 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:48,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:48,807 INFO L85 PathProgramCache]: Analyzing trace with hash 671245147, now seen corresponding path program 1 times [2022-11-16 11:15:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:48,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780622298] [2022-11-16 11:15:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:48,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:15:48,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:48,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780622298] [2022-11-16 11:15:48,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780622298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:48,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:48,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:15:48,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878325866] [2022-11-16 11:15:48,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:48,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:15:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:15:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:15:48,852 INFO L87 Difference]: Start difference. First operand 26670 states and 78846 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:49,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:49,317 INFO L93 Difference]: Finished difference Result 25129 states and 74308 transitions. [2022-11-16 11:15:49,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:15:49,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:15:49,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:49,424 INFO L225 Difference]: With dead ends: 25129 [2022-11-16 11:15:49,424 INFO L226 Difference]: Without dead ends: 25129 [2022-11-16 11:15:49,425 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 11:15:49,425 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:49,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 23 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:49,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25129 states. [2022-11-16 11:15:50,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25129 to 25129. [2022-11-16 11:15:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25129 states, 23691 states have (on average 3.136549744628762) internal successors, (74308), 25128 states have internal predecessors, (74308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25129 states to 25129 states and 74308 transitions. [2022-11-16 11:15:50,467 INFO L78 Accepts]: Start accepts. Automaton has 25129 states and 74308 transitions. Word has length 7 [2022-11-16 11:15:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:50,467 INFO L495 AbstractCegarLoop]: Abstraction has 25129 states and 74308 transitions. [2022-11-16 11:15:50,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 25129 states and 74308 transitions. [2022-11-16 11:15:50,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:15:50,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:50,468 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:50,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:15:50,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -783009900, now seen corresponding path program 1 times [2022-11-16 11:15:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:50,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023140383] [2022-11-16 11:15:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:50,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023140383] [2022-11-16 11:15:50,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023140383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:50,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154255290] [2022-11-16 11:15:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:50,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:50,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:50,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:50,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:15:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:15:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:50,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:15:50,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154255290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:50,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:50,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-16 11:15:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504231293] [2022-11-16 11:15:50,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:15:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:15:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:15:50,746 INFO L87 Difference]: Start difference. First operand 25129 states and 74308 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 11:15:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:51,152 INFO L93 Difference]: Finished difference Result 25135 states and 74314 transitions. [2022-11-16 11:15:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:15:51,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 11 [2022-11-16 11:15:51,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:51,254 INFO L225 Difference]: With dead ends: 25135 [2022-11-16 11:15:51,254 INFO L226 Difference]: Without dead ends: 25135 [2022-11-16 11:15:51,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:15:51,255 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:51,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:15:51,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25135 states. [2022-11-16 11:15:51,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25135 to 25135. [2022-11-16 11:15:51,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25135 states, 23697 states have (on average 3.136008777482382) internal successors, (74314), 25134 states have internal predecessors, (74314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25135 states to 25135 states and 74314 transitions. [2022-11-16 11:15:52,035 INFO L78 Accepts]: Start accepts. Automaton has 25135 states and 74314 transitions. Word has length 11 [2022-11-16 11:15:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:52,035 INFO L495 AbstractCegarLoop]: Abstraction has 25135 states and 74314 transitions. [2022-11-16 11:15:52,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 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 11:15:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25135 states and 74314 transitions. [2022-11-16 11:15:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:15:52,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:52,036 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:52,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:52,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:15:52,237 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash -19217964, now seen corresponding path program 2 times [2022-11-16 11:15:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:52,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597300037] [2022-11-16 11:15:52,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:52,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:52,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:52,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597300037] [2022-11-16 11:15:52,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597300037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:52,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:52,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:15:52,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967506917] [2022-11-16 11:15:52,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:52,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:15:52,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:52,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:15:52,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:52,603 INFO L87 Difference]: Start difference. First operand 25135 states and 74314 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:53,281 INFO L93 Difference]: Finished difference Result 20344 states and 60109 transitions. [2022-11-16 11:15:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:15:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 11:15:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:53,351 INFO L225 Difference]: With dead ends: 20344 [2022-11-16 11:15:53,351 INFO L226 Difference]: Without dead ends: 20344 [2022-11-16 11:15:53,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:15:53,352 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 497 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:53,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 45 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:15:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20344 states. [2022-11-16 11:15:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20344 to 20344. [2022-11-16 11:15:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20344 states, 19560 states have (on average 3.0730572597137016) internal successors, (60109), 20343 states have internal predecessors, (60109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:54,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20344 states to 20344 states and 60109 transitions. [2022-11-16 11:15:54,041 INFO L78 Accepts]: Start accepts. Automaton has 20344 states and 60109 transitions. Word has length 17 [2022-11-16 11:15:54,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:54,042 INFO L495 AbstractCegarLoop]: Abstraction has 20344 states and 60109 transitions. [2022-11-16 11:15:54,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 20344 states and 60109 transitions. [2022-11-16 11:15:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:15:54,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:54,043 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:54,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:15:54,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -19776926, now seen corresponding path program 1 times [2022-11-16 11:15:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:54,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824388820] [2022-11-16 11:15:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:54,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824388820] [2022-11-16 11:15:54,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824388820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:54,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124563187] [2022-11-16 11:15:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:54,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:54,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:54,179 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:54,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:15:54,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:54,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:15:54,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:54,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:15:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:54,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:15:54,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:54,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124563187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:15:54,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:15:54,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-16 11:15:54,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565711314] [2022-11-16 11:15:54,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:15:54,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:15:54,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:54,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:15:54,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:54,419 INFO L87 Difference]: Start difference. First operand 20344 states and 60109 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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 11:15:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:54,703 INFO L93 Difference]: Finished difference Result 3350 states and 9279 transitions. [2022-11-16 11:15:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:15:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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 17 [2022-11-16 11:15:54,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:54,716 INFO L225 Difference]: With dead ends: 3350 [2022-11-16 11:15:54,716 INFO L226 Difference]: Without dead ends: 3350 [2022-11-16 11:15:54,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:15:54,717 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 369 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:54,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 74 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:15:54,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3350 states. [2022-11-16 11:15:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3350 to 3350. [2022-11-16 11:15:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3350 states, 3280 states have (on average 2.8289634146341465) internal successors, (9279), 3349 states have internal predecessors, (9279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 9279 transitions. [2022-11-16 11:15:54,813 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 9279 transitions. Word has length 17 [2022-11-16 11:15:54,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:54,814 INFO L495 AbstractCegarLoop]: Abstraction has 3350 states and 9279 transitions. [2022-11-16 11:15:54,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 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 11:15:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 9279 transitions. [2022-11-16 11:15:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:15:54,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:54,815 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:54,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:15:55,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:55,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:55,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:55,021 INFO L85 PathProgramCache]: Analyzing trace with hash -595764521, now seen corresponding path program 1 times [2022-11-16 11:15:55,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:55,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928253495] [2022-11-16 11:15:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:55,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:55,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:55,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928253495] [2022-11-16 11:15:55,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928253495] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:55,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:55,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:15:55,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302753187] [2022-11-16 11:15:55,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:55,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:15:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:55,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:15:55,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:55,249 INFO L87 Difference]: Start difference. First operand 3350 states and 9279 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:55,532 INFO L93 Difference]: Finished difference Result 4949 states and 13587 transitions. [2022-11-16 11:15:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:15:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:15:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:55,547 INFO L225 Difference]: With dead ends: 4949 [2022-11-16 11:15:55,547 INFO L226 Difference]: Without dead ends: 4949 [2022-11-16 11:15:55,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:15:55,548 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 133 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:55,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 74 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:15:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2022-11-16 11:15:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 3630. [2022-11-16 11:15:55,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3560 states have (on average 2.8764044943820224) internal successors, (10240), 3629 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 10240 transitions. [2022-11-16 11:15:55,674 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 10240 transitions. Word has length 18 [2022-11-16 11:15:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:55,675 INFO L495 AbstractCegarLoop]: Abstraction has 3630 states and 10240 transitions. [2022-11-16 11:15:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 10240 transitions. [2022-11-16 11:15:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:15:55,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:55,676 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:55,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:15:55,676 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -595764753, now seen corresponding path program 1 times [2022-11-16 11:15:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:55,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826193524] [2022-11-16 11:15:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:55,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:55,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826193524] [2022-11-16 11:15:55,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826193524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:15:55,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:15:55,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:15:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262851602] [2022-11-16 11:15:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:15:55,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:15:55,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:15:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:15:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:15:55,846 INFO L87 Difference]: Start difference. First operand 3630 states and 10240 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:15:55,974 INFO L93 Difference]: Finished difference Result 2935 states and 8219 transitions. [2022-11-16 11:15:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:15:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:15:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:15:55,984 INFO L225 Difference]: With dead ends: 2935 [2022-11-16 11:15:55,984 INFO L226 Difference]: Without dead ends: 2935 [2022-11-16 11:15:55,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:15:55,985 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:15:55,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 20 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:15:55,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2022-11-16 11:15:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2935. [2022-11-16 11:15:56,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2915 states have (on average 2.8195540308747855) internal successors, (8219), 2934 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 8219 transitions. [2022-11-16 11:15:56,067 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 8219 transitions. Word has length 18 [2022-11-16 11:15:56,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:15:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 2935 states and 8219 transitions. [2022-11-16 11:15:56,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:15:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 8219 transitions. [2022-11-16 11:15:56,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:15:56,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:15:56,069 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:15:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:15:56,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:15:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:15:56,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1631438215, now seen corresponding path program 1 times [2022-11-16 11:15:56,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:15:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126112117] [2022-11-16 11:15:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:15:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:15:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126112117] [2022-11-16 11:15:56,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126112117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:15:56,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435677520] [2022-11-16 11:15:56,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:15:56,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:15:56,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:15:56,356 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:15:56,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:15:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:15:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:15:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:15:56,516 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 7 treesize of output 6 [2022-11-16 11:15:56,595 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:15:56,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:15:56,621 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 13 treesize of output 15 [2022-11-16 11:15:56,701 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 13 treesize of output 15 [2022-11-16 11:15:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:15:56,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:04,769 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_435 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_435) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-11-16 11:16:06,804 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_435 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_435) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2022-11-16 11:16:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2022-11-16 11:16:07,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435677520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:07,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:07,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2022-11-16 11:16:07,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455898067] [2022-11-16 11:16:07,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:07,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:16:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:16:07,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=79, Unknown=6, NotChecked=38, Total=156 [2022-11-16 11:16:07,129 INFO L87 Difference]: Start difference. First operand 2935 states and 8219 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 11:16:19,187 WARN L233 SmtUtils]: Spent 10.03s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:16:35,259 WARN L233 SmtUtils]: Spent 16.04s on a formula simplification. DAG size of input: 23 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:16:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:35,534 INFO L93 Difference]: Finished difference Result 3859 states and 10659 transitions. [2022-11-16 11:16:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:16:35,535 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:16:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:35,544 INFO L225 Difference]: With dead ends: 3859 [2022-11-16 11:16:35,545 INFO L226 Difference]: Without dead ends: 3859 [2022-11-16 11:16:35,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=59, Invalid=124, Unknown=7, NotChecked=50, Total=240 [2022-11-16 11:16:35,546 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 208 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:35,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 132 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 197 Unchecked, 0.2s Time] [2022-11-16 11:16:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2022-11-16 11:16:35,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 2829. [2022-11-16 11:16:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2829 states, 2809 states have (on average 2.7864008543965824) internal successors, (7827), 2828 states have internal predecessors, (7827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2829 states to 2829 states and 7827 transitions. [2022-11-16 11:16:35,612 INFO L78 Accepts]: Start accepts. Automaton has 2829 states and 7827 transitions. Word has length 21 [2022-11-16 11:16:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:35,612 INFO L495 AbstractCegarLoop]: Abstraction has 2829 states and 7827 transitions. [2022-11-16 11:16:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 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 11:16:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2829 states and 7827 transitions. [2022-11-16 11:16:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:16:35,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:35,614 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:35,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:35,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:16:35,819 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:16:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2127683345, now seen corresponding path program 1 times [2022-11-16 11:16:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:35,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108268459] [2022-11-16 11:16:35,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 11:16:36,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108268459] [2022-11-16 11:16:36,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108268459] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:36,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885296286] [2022-11-16 11:16:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:36,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:36,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:36,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:36,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:16:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:36,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:16:36,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:16:36,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-16 11:16:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 11:16:36,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:16:36,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885296286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:16:36,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:16:36,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-11-16 11:16:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035154494] [2022-11-16 11:16:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:16:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:16:36,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:16:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:16:36,484 INFO L87 Difference]: Start difference. First operand 2829 states and 7827 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:36,625 INFO L93 Difference]: Finished difference Result 2029 states and 5589 transitions. [2022-11-16 11:16:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:16:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 11:16:36,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:36,630 INFO L225 Difference]: With dead ends: 2029 [2022-11-16 11:16:36,630 INFO L226 Difference]: Without dead ends: 2029 [2022-11-16 11:16:36,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:16:36,631 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 85 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:36,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 24 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:16:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2022-11-16 11:16:36,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2022-11-16 11:16:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2025 states have (on average 2.76) internal successors, (5589), 2028 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5589 transitions. [2022-11-16 11:16:36,672 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5589 transitions. Word has length 21 [2022-11-16 11:16:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:36,673 INFO L495 AbstractCegarLoop]: Abstraction has 2029 states and 5589 transitions. [2022-11-16 11:16:36,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:36,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5589 transitions. [2022-11-16 11:16:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:16:36,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:36,675 INFO L195 NwaCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:16:36,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:16:36,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:16:36,880 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:16:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:16:36,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1533672233, now seen corresponding path program 1 times [2022-11-16 11:16:36,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:16:36,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299905088] [2022-11-16 11:16:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:36,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:16:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 11:16:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:16:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299905088] [2022-11-16 11:16:37,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299905088] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:16:37,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632859416] [2022-11-16 11:16:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:16:37,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:16:37,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:16:37,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:16:37,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:16:37,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:16:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:16:37,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:16:37,267 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 7 treesize of output 6 [2022-11-16 11:16:37,333 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:16:37,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:16:37,353 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 13 treesize of output 15 [2022-11-16 11:16:37,382 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 13 treesize of output 15 [2022-11-16 11:16:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 11:16:37,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:16:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-16 11:16:55,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632859416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:16:55,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:16:55,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-11-16 11:16:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769002791] [2022-11-16 11:16:55,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:16:55,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:16:55,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:16:55,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:16:55,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=88, Unknown=9, NotChecked=0, Total=132 [2022-11-16 11:16:55,610 INFO L87 Difference]: Start difference. First operand 2029 states and 5589 transitions. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:59,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:16:59,818 INFO L93 Difference]: Finished difference Result 2332 states and 6261 transitions. [2022-11-16 11:16:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:16:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:16:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:16:59,823 INFO L225 Difference]: With dead ends: 2332 [2022-11-16 11:16:59,823 INFO L226 Difference]: Without dead ends: 2332 [2022-11-16 11:16:59,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=57, Invalid=114, Unknown=11, NotChecked=0, Total=182 [2022-11-16 11:16:59,824 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 194 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:16:59,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 61 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 145 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-11-16 11:16:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-11-16 11:16:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2014. [2022-11-16 11:16:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2014 states, 2011 states have (on average 2.745897563401293) internal successors, (5522), 2013 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2014 states to 2014 states and 5522 transitions. [2022-11-16 11:16:59,864 INFO L78 Accepts]: Start accepts. Automaton has 2014 states and 5522 transitions. Word has length 22 [2022-11-16 11:16:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:16:59,864 INFO L495 AbstractCegarLoop]: Abstraction has 2014 states and 5522 transitions. [2022-11-16 11:16:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:16:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2014 states and 5522 transitions. [2022-11-16 11:16:59,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:16:59,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:16:59,866 INFO L195 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 11:16:59,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:17:00,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_155640da-e8a7-446d-8339-9d205e91a0eb/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:17:00,071 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-16 11:17:00,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:00,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1516093029, now seen corresponding path program 1 times [2022-11-16 11:17:00,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:00,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740280532] [2022-11-16 11:17:00,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:00,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:17:00,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:17:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:17:00,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:17:00,126 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:17:00,126 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-11-16 11:17:00,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-11-16 11:17:00,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-11-16 11:17:00,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-11-16 11:17:00,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-11-16 11:17:00,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-11-16 11:17:00,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (38 of 50 remaining) [2022-11-16 11:17:00,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-11-16 11:17:00,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-11-16 11:17:00,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-11-16 11:17:00,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-11-16 11:17:00,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-11-16 11:17:00,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-11-16 11:17:00,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-11-16 11:17:00,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-11-16 11:17:00,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-11-16 11:17:00,132 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-11-16 11:17:00,133 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-11-16 11:17:00,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-11-16 11:17:00,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-11-16 11:17:00,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-11-16 11:17:00,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-11-16 11:17:00,134 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-11-16 11:17:00,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-11-16 11:17:00,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-11-16 11:17:00,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-11-16 11:17:00,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-11-16 11:17:00,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-11-16 11:17:00,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-11-16 11:17:00,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-11-16 11:17:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:17:00,138 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:17:00,139 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 11:17:00,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 11:17:00,189 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 11:17:00,192 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:17:00,192 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-16 11:17:00,193 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-16 11:17:00,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-11-16 11:17:00,348 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-11-16 11:17:00,349 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-16 11:17:00,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3803 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-11-16 11:17:00,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 87360 [2022-11-16 11:17:08,840 INFO L134 LiptonReduction]: Checked pairs total: 177033 [2022-11-16 11:17:08,840 INFO L136 LiptonReduction]: Total number of compositions: 378 [2022-11-16 11:17:08,841 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 134 places, 177 transitions, 384 flow [2022-11-16 11:17:43,753 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 932671 states, 895923 states have (on average 5.520617285190803) internal successors, (4946048), 932670 states have internal predecessors, (4946048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:43,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:17:43,762 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;@dfefe3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:17:43,762 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-16 11:17:45,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 932671 states, 895923 states have (on average 5.520617285190803) internal successors, (4946048), 932670 states have internal predecessors, (4946048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:17:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:17:45,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:17:45,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:17:45,247 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-16 11:17:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:17:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2421873, now seen corresponding path program 1 times [2022-11-16 11:17:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:17:45,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586977280] [2022-11-16 11:17:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:17:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:17:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:17:45,283 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 11:17:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:17:45,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586977280] [2022-11-16 11:17:45,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586977280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:17:45,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:17:45,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:17:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984612635] [2022-11-16 11:17:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:17:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:17:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:17:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:17:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:17:46,623 INFO L87 Difference]: Start difference. First operand has 932671 states, 895923 states have (on average 5.520617285190803) internal successors, (4946048), 932670 states have internal predecessors, (4946048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) 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)