./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8 --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 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- 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-2329fc7 [2022-12-13 19:45:44,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:45:44,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:45:44,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:45:44,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:45:44,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:45:44,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:45:44,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:45:44,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:45:44,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:45:44,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:45:44,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:45:44,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:45:44,615 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:45:44,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:45:44,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:45:44,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:45:44,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:45:44,620 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:45:44,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:45:44,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:45:44,623 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:45:44,624 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:45:44,625 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:45:44,628 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:45:44,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:45:44,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:45:44,630 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:45:44,630 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:45:44,631 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:45:44,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:45:44,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:45:44,632 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:45:44,633 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:45:44,634 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:45:44,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:45:44,635 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:45:44,635 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:45:44,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:45:44,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:45:44,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:45:44,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 19:45:44,669 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:45:44,669 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:45:44,669 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:45:44,669 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:45:44,670 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:45:44,670 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:45:44,671 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:45:44,671 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:45:44,671 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:45:44,671 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:45:44,671 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 19:45:44,672 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:45:44,673 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:45:44,673 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:45:44,674 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:45:44,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:45:44,674 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:45:44,674 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:45:44,674 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:45:44,674 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:45:44,675 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:45:44,675 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:45:44,675 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:45:44,675 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:45:44,675 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2022-12-13 19:45:44,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:45:44,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:45:44,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:45:44,882 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:45:44,883 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:45:44,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-12-13 19:45:47,440 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:45:47,616 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:45:47,616 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-12-13 19:45:47,623 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/data/b7905e21c/5c7651c3b80c4b459c450825d72ffb82/FLAG665f4092e [2022-12-13 19:45:47,634 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/data/b7905e21c/5c7651c3b80c4b459c450825d72ffb82 [2022-12-13 19:45:47,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:45:47,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:45:47,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:45:47,638 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:45:47,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:45:47,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cc4cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47, skipping insertion in model container [2022-12-13 19:45:47,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,649 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:45:47,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:45:47,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:45:47,868 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:45:47,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:45:47,910 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:45:47,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47 WrapperNode [2022-12-13 19:45:47,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:45:47,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:45:47,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:45:47,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:45:47,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,939 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-12-13 19:45:47,939 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:45:47,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:45:47,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:45:47,940 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:45:47,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,954 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,955 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:45:47,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:45:47,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:45:47,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:45:47,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (1/1) ... [2022-12-13 19:45:47,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:45:47,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:47,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:45:47,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:45:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:45:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:45:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:45:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:45:48,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:45:48,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:45:48,104 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:45:48,105 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:45:48,232 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:45:48,236 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:45:48,236 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-13 19:45:48,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:45:48 BoogieIcfgContainer [2022-12-13 19:45:48,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:45:48,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:45:48,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:45:48,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:45:48,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:45:47" (1/3) ... [2022-12-13 19:45:48,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641fa8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:45:48, skipping insertion in model container [2022-12-13 19:45:48,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:45:47" (2/3) ... [2022-12-13 19:45:48,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641fa8bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:45:48, skipping insertion in model container [2022-12-13 19:45:48,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:45:48" (3/3) ... [2022-12-13 19:45:48,244 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2022-12-13 19:45:48,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:45:48,258 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-13 19:45:48,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:45:48,295 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=PETRI_NET, 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;@2f73adda, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:45:48,295 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-13 19:45:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:45:48,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:48,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:45:48,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:48,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:48,308 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-12-13 19:45:48,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:48,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776388787] [2022-12-13 19:45:48,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:48,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:48,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:48,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776388787] [2022-12-13 19:45:48,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776388787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:48,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:48,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:45:48,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345546616] [2022-12-13 19:45:48,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:48,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:45:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:45:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:48,506 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:48,544 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-12-13 19:45:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:45:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:45:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:48,552 INFO L225 Difference]: With dead ends: 58 [2022-12-13 19:45:48,552 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 19:45:48,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:48,555 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 50 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:48,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 19:45:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-12-13 19:45:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 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) [2022-12-13 19:45:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-12-13 19:45:48,578 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-12-13 19:45:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:48,578 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-12-13 19:45:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,579 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-12-13 19:45:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:45:48,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:48,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:45:48,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 19:45:48,580 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:48,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:48,580 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-12-13 19:45:48,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:48,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928221488] [2022-12-13 19:45:48,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:48,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:48,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:48,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:48,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928221488] [2022-12-13 19:45:48,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928221488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:48,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:48,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:45:48,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644997108] [2022-12-13 19:45:48,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:48,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:45:48,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:48,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:45:48,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:45:48,636 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:48,660 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-12-13 19:45:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:45:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:45:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:48,661 INFO L225 Difference]: With dead ends: 31 [2022-12-13 19:45:48,662 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 19:45:48,662 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 [2022-12-13 19:45:48,663 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:48,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 19:45:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-13 19:45:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 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) [2022-12-13 19:45:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-12-13 19:45:48,666 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-12-13 19:45:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:48,666 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-12-13 19:45:48,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-12-13 19:45:48,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:45:48,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:48,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:45:48,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 19:45:48,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-12-13 19:45:48,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:48,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43445008] [2022-12-13 19:45:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:48,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:48,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:48,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43445008] [2022-12-13 19:45:48,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43445008] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:48,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:48,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:45:48,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224564551] [2022-12-13 19:45:48,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:48,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:45:48,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:48,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:45:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:48,805 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:48,858 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-12-13 19:45:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:45:48,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:45:48,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:48,859 INFO L225 Difference]: With dead ends: 50 [2022-12-13 19:45:48,860 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 19:45:48,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:48,861 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:48,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 19:45:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-12-13 19:45:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-12-13 19:45:48,864 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2022-12-13 19:45:48,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:48,864 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-12-13 19:45:48,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:48,864 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-12-13 19:45:48,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:45:48,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:48,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:45:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 19:45:48,865 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:48,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-12-13 19:45:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:48,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245067393] [2022-12-13 19:45:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:48,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:48,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:48,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245067393] [2022-12-13 19:45:48,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245067393] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:48,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:48,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:45:48,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204354097] [2022-12-13 19:45:48,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:48,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:45:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:45:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:45:48,971 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:49,047 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-12-13 19:45:49,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:45:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:45:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:49,048 INFO L225 Difference]: With dead ends: 56 [2022-12-13 19:45:49,048 INFO L226 Difference]: Without dead ends: 56 [2022-12-13 19:45:49,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:45:49,050 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:49,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:49,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-13 19:45:49,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-12-13 19:45:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-12-13 19:45:49,054 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-12-13 19:45:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:49,055 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-12-13 19:45:49,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-12-13 19:45:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 19:45:49,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:49,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 19:45:49,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 19:45:49,056 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:49,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:49,056 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-12-13 19:45:49,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:49,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177835279] [2022-12-13 19:45:49,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:49,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:49,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:49,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177835279] [2022-12-13 19:45:49,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177835279] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:49,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:49,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:45:49,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968137924] [2022-12-13 19:45:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 19:45:49,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:49,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 19:45:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:45:49,175 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:49,252 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-12-13 19:45:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 19:45:49,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 19:45:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:49,253 INFO L225 Difference]: With dead ends: 55 [2022-12-13 19:45:49,253 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 19:45:49,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:45:49,254 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:49,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 45 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:49,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 19:45:49,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2022-12-13 19:45:49,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-12-13 19:45:49,257 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-12-13 19:45:49,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:49,257 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-12-13 19:45:49,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-12-13 19:45:49,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 19:45:49,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:49,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 19:45:49,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-12-13 19:45:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:49,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14377654] [2022-12-13 19:45:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:49,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:49,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14377654] [2022-12-13 19:45:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14377654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:49,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:49,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:45:49,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811801632] [2022-12-13 19:45:49,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:49,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:45:49,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:45:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:49,290 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:49,320 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-12-13 19:45:49,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:45:49,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 19:45:49,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:49,321 INFO L225 Difference]: With dead ends: 31 [2022-12-13 19:45:49,321 INFO L226 Difference]: Without dead ends: 31 [2022-12-13 19:45:49,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 19:45:49,323 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:49,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 23 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:49,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-12-13 19:45:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-12-13 19:45:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-12-13 19:45:49,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2022-12-13 19:45:49,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:49,326 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-12-13 19:45:49,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-12-13 19:45:49,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 19:45:49,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:49,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:49,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 19:45:49,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-12-13 19:45:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:49,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377049942] [2022-12-13 19:45:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:49,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:49,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:49,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377049942] [2022-12-13 19:45:49,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377049942] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:49,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:49,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 19:45:49,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973522473] [2022-12-13 19:45:49,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:49,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 19:45:49,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:49,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 19:45:49,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 19:45:49,442 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-12-13 19:45:49,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:49,497 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-12-13 19:45:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:45:49,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 19:45:49,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:49,498 INFO L225 Difference]: With dead ends: 42 [2022-12-13 19:45:49,498 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 19:45:49,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:45:49,499 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:49,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 19:45:49,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-12-13 19:45:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.375) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:49,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-13 19:45:49,503 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 8 [2022-12-13 19:45:49,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:49,503 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-13 19:45:49,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2022-12-13 19:45:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-13 19:45:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 19:45:49,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:49,504 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:49,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 19:45:49,505 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:49,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:49,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-12-13 19:45:49,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:49,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827222977] [2022-12-13 19:45:49,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:49,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:49,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827222977] [2022-12-13 19:45:49,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827222977] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:49,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669654776] [2022-12-13 19:45:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:49,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:49,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:49,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:45:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 19:45:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:49,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-13 19:45:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:49,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669654776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:50,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:50,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-12-13 19:45:50,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156919586] [2022-12-13 19:45:50,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:45:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:50,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:45:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:45:50,165 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:50,409 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-12-13 19:45:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 19:45:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 19:45:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:50,410 INFO L225 Difference]: With dead ends: 86 [2022-12-13 19:45:50,410 INFO L226 Difference]: Without dead ends: 86 [2022-12-13 19:45:50,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-12-13 19:45:50,411 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 250 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:50,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 131 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:50,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-12-13 19:45:50,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 36. [2022-12-13 19:45:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-12-13 19:45:50,416 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 10 [2022-12-13 19:45:50,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:50,417 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-12-13 19:45:50,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-12-13 19:45:50,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 19:45:50,417 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:50,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:50,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:45:50,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:50,619 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:50,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:50,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556842, now seen corresponding path program 1 times [2022-12-13 19:45:50,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:50,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318503695] [2022-12-13 19:45:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:50,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:50,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318503695] [2022-12-13 19:45:50,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318503695] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:50,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:50,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 19:45:50,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716372593] [2022-12-13 19:45:50,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:50,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 19:45:50,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:50,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 19:45:50,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:45:50,866 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:50,898 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-13 19:45:50,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 19:45:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-13 19:45:50,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:50,899 INFO L225 Difference]: With dead ends: 35 [2022-12-13 19:45:50,899 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 19:45:50,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 19:45:50,899 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 19:45:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-12-13 19:45:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 32 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-12-13 19:45:50,901 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2022-12-13 19:45:50,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:50,902 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-12-13 19:45:50,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-12-13 19:45:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 19:45:50,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:50,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:50,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 19:45:50,902 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2022-12-13 19:45:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:50,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664367190] [2022-12-13 19:45:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:50,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664367190] [2022-12-13 19:45:50,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664367190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:50,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:50,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:45:50,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328899764] [2022-12-13 19:45:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:50,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:45:50,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:50,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:45:50,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:45:50,919 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:50,925 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-12-13 19:45:50,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:45:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-13 19:45:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:50,926 INFO L225 Difference]: With dead ends: 35 [2022-12-13 19:45:50,926 INFO L226 Difference]: Without dead ends: 35 [2022-12-13 19:45:50,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:45:50,927 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:50,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-12-13 19:45:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-12-13 19:45:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-12-13 19:45:50,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-12-13 19:45:50,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:50,931 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-12-13 19:45:50,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-12-13 19:45:50,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 19:45:50,931 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:50,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 19:45:50,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:50,932 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2022-12-13 19:45:50,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:50,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683308376] [2022-12-13 19:45:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:50,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:51,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683308376] [2022-12-13 19:45:51,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683308376] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:51,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:51,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 19:45:51,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136962590] [2022-12-13 19:45:51,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:51,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:45:51,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:51,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:45:51,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:45:51,053 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:51,138 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-12-13 19:45:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:45:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 19:45:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:51,139 INFO L225 Difference]: With dead ends: 46 [2022-12-13 19:45:51,139 INFO L226 Difference]: Without dead ends: 46 [2022-12-13 19:45:51,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-13 19:45:51,140 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 40 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:51,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 97 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-12-13 19:45:51,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-12-13 19:45:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-12-13 19:45:51,143 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 14 [2022-12-13 19:45:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:51,143 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-12-13 19:45:51,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,144 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-12-13 19:45:51,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 19:45:51,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:51,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:51,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 19:45:51,144 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2022-12-13 19:45:51,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:51,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100000737] [2022-12-13 19:45:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:51,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100000737] [2022-12-13 19:45:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100000737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:51,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:51,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 19:45:51,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050117456] [2022-12-13 19:45:51,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:51,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 19:45:51,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:51,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 19:45:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 19:45:51,303 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:51,409 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-12-13 19:45:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 19:45:51,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 19:45:51,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:51,410 INFO L225 Difference]: With dead ends: 55 [2022-12-13 19:45:51,410 INFO L226 Difference]: Without dead ends: 55 [2022-12-13 19:45:51,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-12-13 19:45:51,411 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 68 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:51,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 98 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:51,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-13 19:45:51,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-12-13 19:45:51,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-12-13 19:45:51,413 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2022-12-13 19:45:51,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:51,413 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-12-13 19:45:51,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,414 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-12-13 19:45:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 19:45:51,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:51,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:51,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 19:45:51,414 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:51,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:51,415 INFO L85 PathProgramCache]: Analyzing trace with hash -782696489, now seen corresponding path program 1 times [2022-12-13 19:45:51,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:51,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410148039] [2022-12-13 19:45:51,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:51,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:51,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410148039] [2022-12-13 19:45:51,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410148039] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:45:51,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:45:51,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:45:51,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280058033] [2022-12-13 19:45:51,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:45:51,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:45:51,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:45:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:51,470 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:51,485 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-12-13 19:45:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:45:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 19:45:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:51,485 INFO L225 Difference]: With dead ends: 40 [2022-12-13 19:45:51,485 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 19:45:51,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:45:51,486 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:51,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:51,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 19:45:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-13 19:45:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-13 19:45:51,488 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2022-12-13 19:45:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:51,489 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-13 19:45:51,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-13 19:45:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 19:45:51,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:51,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:51,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 19:45:51,490 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:51,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2022-12-13 19:45:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:51,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160510259] [2022-12-13 19:45:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:51,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:51,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160510259] [2022-12-13 19:45:51,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160510259] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:51,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462783448] [2022-12-13 19:45:51,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:51,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:51,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:51,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:51,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:45:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:51,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 19:45:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:51,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:45:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:51,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462783448] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:51,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:51,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-12-13 19:45:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151412515] [2022-12-13 19:45:51,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:51,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 19:45:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 19:45:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-12-13 19:45:51,876 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:51,985 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-12-13 19:45:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 19:45:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 19:45:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:51,986 INFO L225 Difference]: With dead ends: 37 [2022-12-13 19:45:51,986 INFO L226 Difference]: Without dead ends: 33 [2022-12-13 19:45:51,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-12-13 19:45:51,987 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 175 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:51,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 57 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:45:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-13 19:45:51,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-12-13 19:45:51,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-12-13 19:45:51,989 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-12-13 19:45:51,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:51,989 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-12-13 19:45:51,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:51,990 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-12-13 19:45:51,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 19:45:51,990 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:51,990 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:51,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 19:45:52,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 19:45:52,191 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:52,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:52,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2022-12-13 19:45:52,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:52,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498999858] [2022-12-13 19:45:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:52,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:52,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498999858] [2022-12-13 19:45:52,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498999858] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581513815] [2022-12-13 19:45:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:45:52,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:52,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:52,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:45:52,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:45:52,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:52,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:45:52,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:52,553 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 14 treesize of output 10 [2022-12-13 19:45:52,769 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:45:52,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:45:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:52,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:53,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:45:53,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:45:53,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:45:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:53,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581513815] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:53,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:53,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-12-13 19:45:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546772880] [2022-12-13 19:45:53,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:53,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-13 19:45:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:53,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-13 19:45:53,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-12-13 19:45:53,266 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:54,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:54,158 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-12-13 19:45:54,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:45:54,158 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 19:45:54,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:54,159 INFO L225 Difference]: With dead ends: 54 [2022-12-13 19:45:54,159 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 19:45:54,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2022-12-13 19:45:54,161 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:54,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 140 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:45:54,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 19:45:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-12-13 19:45:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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) [2022-12-13 19:45:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-12-13 19:45:54,164 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-12-13 19:45:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:54,164 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-12-13 19:45:54,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:54,164 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-12-13 19:45:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 19:45:54,165 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:54,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:54,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:45:54,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 19:45:54,367 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:54,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2022-12-13 19:45:54,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:54,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066127355] [2022-12-13 19:45:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:54,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066127355] [2022-12-13 19:45:54,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066127355] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:54,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355783077] [2022-12-13 19:45:54,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:45:54,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:54,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:54,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:54,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:45:54,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-13 19:45:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 19:45:54,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:54,826 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 14 treesize of output 10 [2022-12-13 19:45:54,966 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:54,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:55,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:45:55,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:45:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:55,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355783077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:55,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:55,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-12-13 19:45:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555188365] [2022-12-13 19:45:55,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:55,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 19:45:55,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 19:45:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:45:55,111 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:55,377 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-12-13 19:45:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 19:45:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-13 19:45:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:55,378 INFO L225 Difference]: With dead ends: 59 [2022-12-13 19:45:55,378 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 19:45:55,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 19:45:55,380 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:55,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 166 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 19:45:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-12-13 19:45:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-12-13 19:45:55,382 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-12-13 19:45:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:55,382 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-12-13 19:45:55,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-12-13 19:45:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 19:45:55,383 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:55,383 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:55,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:45:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 19:45:55,585 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2022-12-13 19:45:55,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:55,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883824839] [2022-12-13 19:45:55,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:55,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883824839] [2022-12-13 19:45:55,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883824839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554252879] [2022-12-13 19:45:55,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:45:55,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:55,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:55,898 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:45:55,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:45:55,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-13 19:45:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:55,962 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 [2022-12-13 19:45:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:56,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:56,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554252879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:56,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:56,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-12-13 19:45:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564530317] [2022-12-13 19:45:56,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:56,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 19:45:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 19:45:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-12-13 19:45:56,317 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:56,524 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-12-13 19:45:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 19:45:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-13 19:45:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:56,525 INFO L225 Difference]: With dead ends: 50 [2022-12-13 19:45:56,526 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 19:45:56,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 19:45:56,527 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 291 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 140 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 19:45:56,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-12-13 19:45:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-12-13 19:45:56,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-12-13 19:45:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:56,529 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-12-13 19:45:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 28 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-12-13 19:45:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-13 19:45:56,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:56,529 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:56,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:45:56,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:56,730 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:56,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2022-12-13 19:45:56,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:56,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066681458] [2022-12-13 19:45:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:56,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:57,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066681458] [2022-12-13 19:45:57,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066681458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:57,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672413146] [2022-12-13 19:45:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:45:57,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:57,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:57,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:45:57,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-12-13 19:45:57,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:57,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:45:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:57,245 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 14 treesize of output 10 [2022-12-13 19:45:57,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:45:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:57,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:57,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:45:57,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:45:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:57,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672413146] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:57,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:57,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-12-13 19:45:57,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810919674] [2022-12-13 19:45:57,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:57,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 19:45:57,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:57,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 19:45:57,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-12-13 19:45:57,511 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:57,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:57,798 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-12-13 19:45:57,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:45:57,798 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-13 19:45:57,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:57,798 INFO L225 Difference]: With dead ends: 75 [2022-12-13 19:45:57,798 INFO L226 Difference]: Without dead ends: 52 [2022-12-13 19:45:57,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 19:45:57,799 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 105 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:57,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 192 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-12-13 19:45:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-12-13 19:45:57,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:57,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-12-13 19:45:57,801 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-12-13 19:45:57,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:57,801 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-12-13 19:45:57,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:57,801 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-12-13 19:45:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 19:45:57,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:57,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:57,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:45:58,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 19:45:58,003 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:58,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2022-12-13 19:45:58,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:58,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779363182] [2022-12-13 19:45:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:58,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779363182] [2022-12-13 19:45:58,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779363182] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:58,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463414799] [2022-12-13 19:45:58,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:45:58,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:58,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:58,309 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:58,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:45:58,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-12-13 19:45:58,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:45:58,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 19:45:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:58,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:45:58,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 19:45:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:58,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463414799] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:45:58,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:45:58,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-12-13 19:45:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742594292] [2022-12-13 19:45:58,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:45:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 19:45:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:45:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 19:45:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-12-13 19:45:58,827 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:59,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:45:59,051 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-12-13 19:45:59,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 19:45:59,052 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 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 48 [2022-12-13 19:45:59,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:45:59,052 INFO L225 Difference]: With dead ends: 60 [2022-12-13 19:45:59,052 INFO L226 Difference]: Without dead ends: 60 [2022-12-13 19:45:59,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 19:45:59,053 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 258 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:45:59,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 151 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:45:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-13 19:45:59,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-12-13 19:45:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-12-13 19:45:59,054 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2022-12-13 19:45:59,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:45:59,055 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-12-13 19:45:59,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:45:59,055 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-12-13 19:45:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 19:45:59,055 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:45:59,055 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:45:59,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:45:59,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:59,257 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:45:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:45:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2022-12-13 19:45:59,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:45:59,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388423487] [2022-12-13 19:45:59,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:45:59,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:45:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:45:59,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:45:59,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388423487] [2022-12-13 19:45:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388423487] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:45:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120415980] [2022-12-13 19:45:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:45:59,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:45:59,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:45:59,641 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:45:59,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:45:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:45:59,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-13 19:45:59,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:45:59,879 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 14 treesize of output 10 [2022-12-13 19:46:00,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:46:00,146 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:00,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:00,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:00,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:46:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:00,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120415980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:00,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:00,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-12-13 19:46:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117709558] [2022-12-13 19:46:00,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:00,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-13 19:46:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-13 19:46:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 19:46:00,632 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:01,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:01,113 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-12-13 19:46:01,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 19:46:01,114 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2022-12-13 19:46:01,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:01,114 INFO L225 Difference]: With dead ends: 91 [2022-12-13 19:46:01,114 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 19:46:01,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 19:46:01,116 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:01,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 343 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:46:01,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 19:46:01,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-12-13 19:46:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:01,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-12-13 19:46:01,118 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-12-13 19:46:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:01,118 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-12-13 19:46:01,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.025) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-12-13 19:46:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 19:46:01,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:01,119 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:01,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:46:01,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:01,321 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:01,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2022-12-13 19:46:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:01,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259151943] [2022-12-13 19:46:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:01,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259151943] [2022-12-13 19:46:01,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259151943] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:01,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194521444] [2022-12-13 19:46:01,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:46:01,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:01,659 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:01,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:46:01,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:46:01,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:01,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-13 19:46:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:01,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:02,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:46:02,163 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:02,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194521444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:02,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:02,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-12-13 19:46:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667145555] [2022-12-13 19:46:02,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:02,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 19:46:02,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 19:46:02,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-12-13 19:46:02,165 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:02,415 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-12-13 19:46:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 19:46:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-12-13 19:46:02,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:02,416 INFO L225 Difference]: With dead ends: 70 [2022-12-13 19:46:02,416 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 19:46:02,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 19:46:02,417 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 374 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:02,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 256 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:46:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 19:46:02,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-12-13 19:46:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-12-13 19:46:02,419 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2022-12-13 19:46:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:02,419 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-12-13 19:46:02,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.903225806451613) internal successors, (121), 32 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-12-13 19:46:02,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-13 19:46:02,420 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:02,421 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:02,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:46:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:02,622 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:02,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:02,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2022-12-13 19:46:02,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:02,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078469558] [2022-12-13 19:46:02,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:02,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078469558] [2022-12-13 19:46:03,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078469558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029798467] [2022-12-13 19:46:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:46:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:03,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:03,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 19:46:03,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 19:46:03,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:03,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2022-12-13 19:46:03,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:03,485 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 14 treesize of output 10 [2022-12-13 19:46:03,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:46:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:03,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:03,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:46:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:03,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029798467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:03,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:03,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-12-13 19:46:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402179991] [2022-12-13 19:46:03,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:03,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 19:46:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 19:46:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 19:46:03,782 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:04,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:04,293 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2022-12-13 19:46:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 19:46:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-12-13 19:46:04,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:04,294 INFO L225 Difference]: With dead ends: 107 [2022-12-13 19:46:04,294 INFO L226 Difference]: Without dead ends: 72 [2022-12-13 19:46:04,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2022-12-13 19:46:04,295 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:04,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 452 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:46:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-12-13 19:46:04,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-12-13 19:46:04,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:04,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-12-13 19:46:04,297 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-12-13 19:46:04,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:04,297 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-12-13 19:46:04,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.242424242424242) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:04,297 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-12-13 19:46:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-13 19:46:04,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:04,298 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:04,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 19:46:04,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 19:46:04,499 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:04,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2022-12-13 19:46:04,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:04,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453937074] [2022-12-13 19:46:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:04,939 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:04,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453937074] [2022-12-13 19:46:04,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453937074] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:04,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208099220] [2022-12-13 19:46:04,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:46:04,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:04,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:04,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:04,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 19:46:05,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:46:05,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:05,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 19:46:05,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:05,033 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 [2022-12-13 19:46:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:05,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:05,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208099220] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:05,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:05,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-12-13 19:46:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489228201] [2022-12-13 19:46:05,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:05,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 19:46:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 19:46:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 19:46:05,698 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:06,157 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-12-13 19:46:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 19:46:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 0 states have call successors, (0), 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 68 [2022-12-13 19:46:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:06,159 INFO L225 Difference]: With dead ends: 80 [2022-12-13 19:46:06,159 INFO L226 Difference]: Without dead ends: 80 [2022-12-13 19:46:06,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-12-13 19:46:06,160 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 372 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:06,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 369 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:46:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-13 19:46:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-12-13 19:46:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-12-13 19:46:06,162 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2022-12-13 19:46:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:06,162 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-12-13 19:46:06,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.9761904761904763) internal successors, (167), 43 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-12-13 19:46:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 19:46:06,163 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:06,163 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:06,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 19:46:06,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 19:46:06,364 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:06,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2022-12-13 19:46:06,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:06,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523972008] [2022-12-13 19:46:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:06,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:06,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:06,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:06,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523972008] [2022-12-13 19:46:06,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523972008] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:06,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158881666] [2022-12-13 19:46:06,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:46:06,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:06,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:06,891 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:06,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 19:46:06,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 19:46:06,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:06,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 54 conjunts are in the unsatisfiable core [2022-12-13 19:46:06,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:06,971 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 [2022-12-13 19:46:07,073 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 14 treesize of output 10 [2022-12-13 19:46:07,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:46:07,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:46:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:08,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:08,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:46:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:09,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158881666] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:09,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:09,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-12-13 19:46:09,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799510019] [2022-12-13 19:46:09,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 19:46:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:09,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 19:46:09,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 19:46:09,099 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:12,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:46:30,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:46:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:36,076 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2022-12-13 19:46:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 19:46:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 0 states have call successors, (0), 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 74 [2022-12-13 19:46:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:36,077 INFO L225 Difference]: With dead ends: 134 [2022-12-13 19:46:36,077 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 19:46:36,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1199, Invalid=6809, Unknown=2, NotChecked=0, Total=8010 [2022-12-13 19:46:36,078 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 644 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:36,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 754 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1456 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2022-12-13 19:46:36,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 19:46:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2022-12-13 19:46:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-12-13 19:46:36,080 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 74 [2022-12-13 19:46:36,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:36,080 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-12-13 19:46:36,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.540983606557377) internal successors, (216), 61 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:36,080 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-12-13 19:46:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-12-13 19:46:36,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:36,081 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:36,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 19:46:36,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:36,282 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:36,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2078674125, now seen corresponding path program 12 times [2022-12-13 19:46:36,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:36,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685105216] [2022-12-13 19:46:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:36,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:36,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:36,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685105216] [2022-12-13 19:46:36,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685105216] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:36,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720557889] [2022-12-13 19:46:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:46:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:36,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:36,886 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:36,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 19:46:37,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-12-13 19:46:37,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 19:46:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:37,279 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 14 treesize of output 10 [2022-12-13 19:46:37,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:46:37,470 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:37,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:37,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:37,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:46:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:37,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720557889] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:37,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:37,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-12-13 19:46:37,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082638428] [2022-12-13 19:46:37,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:37,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 19:46:37,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:37,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 19:46:37,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 19:46:37,739 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:38,711 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-12-13 19:46:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 19:46:38,711 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 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 84 [2022-12-13 19:46:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:38,712 INFO L225 Difference]: With dead ends: 139 [2022-12-13 19:46:38,712 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 19:46:38,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=315, Invalid=2991, Unknown=0, NotChecked=0, Total=3306 [2022-12-13 19:46:38,713 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 256 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:38,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 733 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 19:46:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 19:46:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-12-13 19:46:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-12-13 19:46:38,714 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-12-13 19:46:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:38,714 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-12-13 19:46:38,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.4615384615384617) internal successors, (135), 39 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-12-13 19:46:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-13 19:46:38,715 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:38,715 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:38,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 19:46:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 19:46:38,916 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:38,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:38,917 INFO L85 PathProgramCache]: Analyzing trace with hash -53373744, now seen corresponding path program 13 times [2022-12-13 19:46:38,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:38,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848790843] [2022-12-13 19:46:38,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:38,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:39,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848790843] [2022-12-13 19:46:39,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848790843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:39,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7375638] [2022-12-13 19:46:39,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:46:39,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:39,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:39,512 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:39,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 19:46:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:39,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-13 19:46:39,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:39,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:40,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:46:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:40,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7375638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:40,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:40,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2022-12-13 19:46:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73694537] [2022-12-13 19:46:40,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 19:46:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 19:46:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 19:46:40,355 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:40,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:40,895 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-12-13 19:46:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 19:46:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-12-13 19:46:40,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:40,896 INFO L225 Difference]: With dead ends: 100 [2022-12-13 19:46:40,896 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 19:46:40,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-12-13 19:46:40,897 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 270 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:40,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 509 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 19:46:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 19:46:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-12-13 19:46:40,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:40,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-12-13 19:46:40,898 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2022-12-13 19:46:40,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:40,898 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-12-13 19:46:40,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.209302325581396) internal successors, (181), 44 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:40,899 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-12-13 19:46:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-13 19:46:40,899 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:40,899 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:40,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 19:46:41,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 19:46:41,101 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:41,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:41,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 14 times [2022-12-13 19:46:41,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:41,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264681690] [2022-12-13 19:46:41,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:41,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264681690] [2022-12-13 19:46:41,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264681690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:41,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745223592] [2022-12-13 19:46:41,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:46:41,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:41,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:41,757 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:41,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 19:46:41,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:46:41,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:41,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 19:46:41,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:41,979 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 14 treesize of output 10 [2022-12-13 19:46:42,976 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:46:42,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:46:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:43,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:44,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:44,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:46:44,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:46:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:44,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745223592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:44,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:44,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2022-12-13 19:46:44,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394529825] [2022-12-13 19:46:44,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:44,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 19:46:44,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:44,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 19:46:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 19:46:44,400 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:48,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:46:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:52,806 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-12-13 19:46:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 19:46:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 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 94 [2022-12-13 19:46:52,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:52,808 INFO L225 Difference]: With dead ends: 166 [2022-12-13 19:46:52,808 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 19:46:52,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 140 SyntacticMatches, 9 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1128, Invalid=7992, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:46:52,810 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 628 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2195 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 2208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:52,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 1250 Invalid, 2208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2195 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-12-13 19:46:52,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 19:46:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-12-13 19:46:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:52,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-12-13 19:46:52,813 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2022-12-13 19:46:52,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:52,813 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-12-13 19:46:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.78125) internal successors, (242), 64 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-12-13 19:46:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-12-13 19:46:52,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:52,814 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:52,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 19:46:53,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 19:46:53,016 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 15 times [2022-12-13 19:46:53,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:53,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450904398] [2022-12-13 19:46:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:53,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450904398] [2022-12-13 19:46:53,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450904398] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:53,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318901862] [2022-12-13 19:46:53,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:46:53,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:53,752 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:53,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 19:46:53,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-13 19:46:53,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:53,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-13 19:46:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:54,230 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 14 treesize of output 10 [2022-12-13 19:46:54,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:46:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:54,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:54,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:46:54,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:46:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:54,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318901862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:54,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:54,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-12-13 19:46:54,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51415873] [2022-12-13 19:46:54,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:54,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-13 19:46:54,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-13 19:46:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 19:46:54,709 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:55,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:55,975 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-12-13 19:46:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-13 19:46:55,975 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 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 104 [2022-12-13 19:46:55,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:55,976 INFO L225 Difference]: With dead ends: 171 [2022-12-13 19:46:55,976 INFO L226 Difference]: Without dead ends: 112 [2022-12-13 19:46:55,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 19:46:55,976 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 262 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 1811 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:55,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1103 Invalid, 1820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 19:46:55,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-13 19:46:55,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-12-13 19:46:55,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-12-13 19:46:55,978 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-12-13 19:46:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:55,979 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-12-13 19:46:55,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-12-13 19:46:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-12-13 19:46:55,980 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:55,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:55,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 19:46:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 19:46:56,182 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:56,183 INFO L85 PathProgramCache]: Analyzing trace with hash -631787522, now seen corresponding path program 16 times [2022-12-13 19:46:56,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824946058] [2022-12-13 19:46:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:56,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:46:57,022 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:57,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:46:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824946058] [2022-12-13 19:46:57,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824946058] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:46:57,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72119290] [2022-12-13 19:46:57,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:46:57,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:46:57,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:46:57,024 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:46:57,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 19:46:57,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:46:57,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:46:57,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 19:46:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:46:57,158 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 [2022-12-13 19:46:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:57,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:46:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:46:58,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72119290] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:46:58,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:46:58,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 62 [2022-12-13 19:46:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979550452] [2022-12-13 19:46:58,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:46:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 19:46:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:46:58,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 19:46:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 19:46:58,486 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:46:59,425 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-12-13 19:46:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 19:46:59,426 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 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 108 [2022-12-13 19:46:59,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:46:59,426 INFO L225 Difference]: With dead ends: 120 [2022-12-13 19:46:59,426 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 19:46:59,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1137, Invalid=4715, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 19:46:59,427 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 997 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1349 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:46:59,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 792 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1349 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 19:46:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 19:46:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-12-13 19:46:59,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0175438596491229) internal successors, (116), 114 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-12-13 19:46:59,429 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2022-12-13 19:46:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:46:59,429 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-12-13 19:46:59,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.241935483870968) internal successors, (263), 63 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:46:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-12-13 19:46:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-13 19:46:59,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:46:59,430 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:46:59,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 19:46:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 19:46:59,632 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:46:59,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:46:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 17 times [2022-12-13 19:46:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:46:59,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945735929] [2022-12-13 19:46:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:46:59,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:46:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:00,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:00,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945735929] [2022-12-13 19:47:00,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945735929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:00,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144235104] [2022-12-13 19:47:00,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:47:00,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:00,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:00,460 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:00,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 19:47:00,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-12-13 19:47:00,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 19:47:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:00,607 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 [2022-12-13 19:47:00,901 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 14 treesize of output 10 [2022-12-13 19:47:02,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:47:02,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-12-13 19:47:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:03,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:04,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:47:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:47:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144235104] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:05,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-12-13 19:47:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920103681] [2022-12-13 19:47:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:05,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 19:47:05,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:05,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 19:47:05,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=6243, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 19:47:05,772 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:24,101 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-12-13 19:47:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-12-13 19:47:24,101 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2022-12-13 19:47:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:24,102 INFO L225 Difference]: With dead ends: 198 [2022-12-13 19:47:24,102 INFO L226 Difference]: Without dead ends: 133 [2022-12-13 19:47:24,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=1961, Invalid=11845, Unknown=0, NotChecked=0, Total=13806 [2022-12-13 19:47:24,103 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1777 mSDsluCounter, 1615 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1777 SdHoareTripleChecker+Valid, 1663 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:24,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1777 Valid, 1663 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2849 Invalid, 3 Unknown, 0 Unchecked, 3.2s Time] [2022-12-13 19:47:24,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-12-13 19:47:24,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2022-12-13 19:47:24,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-12-13 19:47:24,105 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2022-12-13 19:47:24,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:24,106 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-12-13 19:47:24,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 4.048192771084337) internal successors, (336), 83 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-12-13 19:47:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-12-13 19:47:24,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:24,106 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:24,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 19:47:24,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:24,308 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 18 times [2022-12-13 19:47:24,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:24,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961283154] [2022-12-13 19:47:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:25,319 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:25,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961283154] [2022-12-13 19:47:25,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961283154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:25,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947612334] [2022-12-13 19:47:25,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:47:25,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:25,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:25,320 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:25,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 19:47:25,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-12-13 19:47:25,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 19:47:25,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:25,898 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 14 treesize of output 10 [2022-12-13 19:47:26,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:47:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:26,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:26,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:47:26,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:47:26,523 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:26,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947612334] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:26,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:26,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-12-13 19:47:26,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832490728] [2022-12-13 19:47:26,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:26,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-13 19:47:26,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-13 19:47:26,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 19:47:26,525 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:27,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:27,981 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-12-13 19:47:27,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 19:47:27,982 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 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 124 [2022-12-13 19:47:27,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:27,983 INFO L225 Difference]: With dead ends: 203 [2022-12-13 19:47:27,983 INFO L226 Difference]: Without dead ends: 132 [2022-12-13 19:47:27,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2022-12-13 19:47:27,984 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 385 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:27,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 1481 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 19:47:27,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-12-13 19:47:27,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-12-13 19:47:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-12-13 19:47:27,987 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-12-13 19:47:27,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:27,987 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-12-13 19:47:27,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7450980392156863) internal successors, (191), 51 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:27,987 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-12-13 19:47:27,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-13 19:47:27,988 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:27,988 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:27,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 19:47:28,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 19:47:28,189 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 19 times [2022-12-13 19:47:28,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541052743] [2022-12-13 19:47:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:28,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:29,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541052743] [2022-12-13 19:47:29,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541052743] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:29,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395211033] [2022-12-13 19:47:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:47:29,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:29,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:29,023 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:29,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 19:47:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:29,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 19:47:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:30,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:47:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:30,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395211033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:30,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:30,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2022-12-13 19:47:30,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615826316] [2022-12-13 19:47:30,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:30,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-13 19:47:30,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:30,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-13 19:47:30,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2022-12-13 19:47:30,482 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:31,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:31,300 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-12-13 19:47:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-13 19:47:31,301 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 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 128 [2022-12-13 19:47:31,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:31,302 INFO L225 Difference]: With dead ends: 140 [2022-12-13 19:47:31,302 INFO L226 Difference]: Without dead ends: 140 [2022-12-13 19:47:31,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 211 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1059, Invalid=4641, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 19:47:31,303 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 625 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:31,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 911 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 19:47:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-12-13 19:47:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-12-13 19:47:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-12-13 19:47:31,306 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2022-12-13 19:47:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:31,306 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-12-13 19:47:31,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.423728813559322) internal successors, (261), 60 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-12-13 19:47:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-13 19:47:31,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:31,307 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:31,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-13 19:47:31,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:31,508 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:31,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 20 times [2022-12-13 19:47:31,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:31,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182434225] [2022-12-13 19:47:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:31,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:32,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:32,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182434225] [2022-12-13 19:47:32,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182434225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:32,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616720540] [2022-12-13 19:47:32,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:47:32,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:32,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:32,657 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:32,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 19:47:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:47:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 84 conjunts are in the unsatisfiable core [2022-12-13 19:47:32,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:33,039 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 14 treesize of output 10 [2022-12-13 19:47:34,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:47:34,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:47:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:34,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:36,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:47:36,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:47:36,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:47:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:36,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616720540] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:36,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:36,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 84 [2022-12-13 19:47:36,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142282807] [2022-12-13 19:47:36,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:36,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-12-13 19:47:36,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:36,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-12-13 19:47:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2022-12-13 19:47:36,804 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:43,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:43,872 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2022-12-13 19:47:43,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 19:47:43,873 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 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 134 [2022-12-13 19:47:43,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:43,873 INFO L225 Difference]: With dead ends: 230 [2022-12-13 19:47:43,873 INFO L226 Difference]: Without dead ends: 153 [2022-12-13 19:47:43,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 204 SyntacticMatches, 13 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2463 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1766, Invalid=13486, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 19:47:43,874 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1373 mSDsluCounter, 2239 mSDsCounter, 0 mSdLazyCounter, 3833 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 2295 SdHoareTripleChecker+Invalid, 3840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3833 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:43,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 2295 Invalid, 3840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3833 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-12-13 19:47:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-12-13 19:47:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-12-13 19:47:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-12-13 19:47:43,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 134 [2022-12-13 19:47:43,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:43,876 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-12-13 19:47:43,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.119047619047619) internal successors, (346), 84 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-12-13 19:47:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-13 19:47:43,877 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:43,877 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:43,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 19:47:44,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:44,078 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:44,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2022-12-13 19:47:44,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:44,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444103690] [2022-12-13 19:47:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:45,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:45,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444103690] [2022-12-13 19:47:45,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444103690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:45,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171489452] [2022-12-13 19:47:45,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:47:45,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:45,262 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:45,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 19:47:45,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-13 19:47:45,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:45,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-13 19:47:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:46,114 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 14 treesize of output 10 [2022-12-13 19:47:46,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:47:46,394 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:46,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:46,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:47:46,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:47:46,796 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:46,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171489452] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:46,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:46,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-12-13 19:47:46,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324944099] [2022-12-13 19:47:46,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:46,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-13 19:47:46,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-13 19:47:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 19:47:46,799 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:48,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:48,810 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2022-12-13 19:47:48,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-13 19:47:48,810 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-12-13 19:47:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:48,810 INFO L225 Difference]: With dead ends: 235 [2022-12-13 19:47:48,810 INFO L226 Difference]: Without dead ends: 152 [2022-12-13 19:47:48,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 263 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=471, Invalid=7185, Unknown=0, NotChecked=0, Total=7656 [2022-12-13 19:47:48,811 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 445 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 3459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:48,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 2140 Invalid, 3459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3446 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 19:47:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-13 19:47:48,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-12-13 19:47:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:48,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-12-13 19:47:48,816 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-12-13 19:47:48,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:48,816 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-12-13 19:47:48,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.8421052631578947) internal successors, (219), 57 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:48,817 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-12-13 19:47:48,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-13 19:47:48,817 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:48,817 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:48,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 19:47:49,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 19:47:49,018 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:49,019 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2022-12-13 19:47:49,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:49,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479893139] [2022-12-13 19:47:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:49,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:50,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479893139] [2022-12-13 19:47:50,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479893139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:50,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16483579] [2022-12-13 19:47:50,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:47:50,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:50,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:50,009 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:50,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 19:47:50,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:47:50,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:50,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 19:47:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:50,221 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 [2022-12-13 19:47:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:50,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:52,093 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:52,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16483579] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:47:52,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:47:52,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 82 [2022-12-13 19:47:52,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588046815] [2022-12-13 19:47:52,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:47:52,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-12-13 19:47:52,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:47:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-12-13 19:47:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=5919, Unknown=0, NotChecked=0, Total=6806 [2022-12-13 19:47:52,096 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:47:53,333 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-12-13 19:47:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-13 19:47:53,333 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 0 states have call successors, (0), 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 148 [2022-12-13 19:47:53,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:47:53,334 INFO L225 Difference]: With dead ends: 160 [2022-12-13 19:47:53,334 INFO L226 Difference]: Without dead ends: 160 [2022-12-13 19:47:53,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=8147, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 19:47:53,335 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1109 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 1407 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:47:53,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1109 Valid, 1407 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 19:47:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-12-13 19:47:53,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-12-13 19:47:53,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-12-13 19:47:53,337 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2022-12-13 19:47:53,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:47:53,337 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-12-13 19:47:53,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.378048780487805) internal successors, (359), 83 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:47:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-12-13 19:47:53,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-12-13 19:47:53,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:47:53,337 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:47:53,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 19:47:53,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 19:47:53,538 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:47:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:47:53,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2022-12-13 19:47:53,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:47:53,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738523834] [2022-12-13 19:47:53,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:47:53,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:47:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:47:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:54,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:47:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738523834] [2022-12-13 19:47:54,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738523834] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:47:54,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056827897] [2022-12-13 19:47:54,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:47:54,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:47:54,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:47:54,690 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:47:54,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 19:47:54,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-12-13 19:47:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:47:54,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 19:47:54,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:47:54,954 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 [2022-12-13 19:47:55,457 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 14 treesize of output 10 [2022-12-13 19:47:57,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:47:57,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-12-13 19:47:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 697 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:47:57,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:47:59,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:47:59,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:48:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:01,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056827897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:01,867 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:01,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2022-12-13 19:48:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560662435] [2022-12-13 19:48:01,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:01,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-13 19:48:01,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:01,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-13 19:48:01,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=10414, Unknown=1, NotChecked=0, Total=11342 [2022-12-13 19:48:01,869 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:23,433 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2022-12-13 19:48:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-13 19:48:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 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 154 [2022-12-13 19:48:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:23,434 INFO L225 Difference]: With dead ends: 262 [2022-12-13 19:48:23,434 INFO L226 Difference]: Without dead ends: 173 [2022-12-13 19:48:23,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=3081, Invalid=19268, Unknown=1, NotChecked=0, Total=22350 [2022-12-13 19:48:23,436 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1874 mSDsluCounter, 3158 mSDsCounter, 0 mSdLazyCounter, 5320 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 3222 SdHoareTripleChecker+Invalid, 5325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5320 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:23,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 3222 Invalid, 5325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5320 Invalid, 4 Unknown, 0 Unchecked, 6.5s Time] [2022-12-13 19:48:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-13 19:48:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2022-12-13 19:48:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-12-13 19:48:23,438 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 154 [2022-12-13 19:48:23,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:23,438 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-12-13 19:48:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 4.261682242990654) internal successors, (456), 107 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:23,438 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-12-13 19:48:23,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-13 19:48:23,439 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:23,439 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:23,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-12-13 19:48:23,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-13 19:48:23,640 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:48:23,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:23,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 24 times [2022-12-13 19:48:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:23,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340469482] [2022-12-13 19:48:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:24,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340469482] [2022-12-13 19:48:24,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340469482] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:24,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621076044] [2022-12-13 19:48:24,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:48:24,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:24,966 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:24,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 19:48:25,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-12-13 19:48:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:25,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 109 conjunts are in the unsatisfiable core [2022-12-13 19:48:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:26,014 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 14 treesize of output 10 [2022-12-13 19:48:26,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:48:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:26,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:26,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:48:26,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:48:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:26,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621076044] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:26,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:26,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2022-12-13 19:48:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755854055] [2022-12-13 19:48:26,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-13 19:48:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-13 19:48:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2022-12-13 19:48:26,727 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:29,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:29,124 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2022-12-13 19:48:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 19:48:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 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 164 [2022-12-13 19:48:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:29,125 INFO L225 Difference]: With dead ends: 267 [2022-12-13 19:48:29,126 INFO L226 Difference]: Without dead ends: 172 [2022-12-13 19:48:29,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 19:48:29,127 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 606 mSDsluCounter, 2531 mSDsCounter, 0 mSdLazyCounter, 4137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 4152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 4137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:29,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 2596 Invalid, 4152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 4137 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 19:48:29,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-12-13 19:48:29,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-12-13 19:48:29,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-12-13 19:48:29,130 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-12-13 19:48:29,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:29,130 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-12-13 19:48:29,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 63 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-12-13 19:48:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-12-13 19:48:29,131 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:29,132 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:29,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-13 19:48:29,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 19:48:29,332 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:48:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 25 times [2022-12-13 19:48:29,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:29,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498683575] [2022-12-13 19:48:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:29,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:30,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498683575] [2022-12-13 19:48:30,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498683575] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860404795] [2022-12-13 19:48:30,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:48:30,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:30,546 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:30,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 19:48:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:30,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 19:48:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:31,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:31,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:32,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:48:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:32,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860404795] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:32,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:32,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2022-12-13 19:48:32,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528673474] [2022-12-13 19:48:32,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:32,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-12-13 19:48:32,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-12-13 19:48:32,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2022-12-13 19:48:32,704 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:34,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:34,244 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-12-13 19:48:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-13 19:48:34,244 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 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 168 [2022-12-13 19:48:34,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:34,246 INFO L225 Difference]: With dead ends: 180 [2022-12-13 19:48:34,246 INFO L226 Difference]: Without dead ends: 180 [2022-12-13 19:48:34,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 279 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1677, Invalid=7443, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:48:34,247 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1463 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1463 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:34,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1463 Valid, 1448 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 19:48:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-13 19:48:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-12-13 19:48:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0114942528735633) internal successors, (176), 174 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-12-13 19:48:34,249 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2022-12-13 19:48:34,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:34,249 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-12-13 19:48:34,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.546666666666667) internal successors, (341), 76 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-12-13 19:48:34,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-12-13 19:48:34,250 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:34,250 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:34,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 19:48:34,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:34,451 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:48:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:34,452 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 26 times [2022-12-13 19:48:34,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:34,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473369344] [2022-12-13 19:48:34,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:34,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:48:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:48:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473369344] [2022-12-13 19:48:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473369344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:48:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361692969] [2022-12-13 19:48:36,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:48:36,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:48:36,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:48:36,296 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:48:36,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 19:48:36,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:48:36,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:48:36,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 104 conjunts are in the unsatisfiable core [2022-12-13 19:48:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:48:37,055 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 14 treesize of output 10 [2022-12-13 19:48:39,528 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:48:39,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:48:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:39,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:48:42,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:48:42,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:48:42,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-12-13 19:48:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:48:42,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361692969] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:48:42,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:48:42,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 104 [2022-12-13 19:48:42,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002652815] [2022-12-13 19:48:42,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:48:42,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-12-13 19:48:42,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:48:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-12-13 19:48:42,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=9988, Unknown=0, NotChecked=0, Total=10712 [2022-12-13 19:48:42,730 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:51,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:48:57,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:48:58,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:48:58,903 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2022-12-13 19:48:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 19:48:58,904 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-12-13 19:48:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:48:58,904 INFO L225 Difference]: With dead ends: 294 [2022-12-13 19:48:58,904 INFO L226 Difference]: Without dead ends: 193 [2022-12-13 19:48:58,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 268 SyntacticMatches, 17 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3800 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=2548, Invalid=20404, Unknown=0, NotChecked=0, Total=22952 [2022-12-13 19:48:58,906 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1108 mSDsluCounter, 3576 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 5923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:48:58,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 3648 Invalid, 5923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 5915 Invalid, 3 Unknown, 0 Unchecked, 8.6s Time] [2022-12-13 19:48:58,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-13 19:48:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2022-12-13 19:48:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-12-13 19:48:58,908 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2022-12-13 19:48:58,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:48:58,908 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-12-13 19:48:58,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 4.326923076923077) internal successors, (450), 104 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:48:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-12-13 19:48:58,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-12-13 19:48:58,909 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:48:58,909 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:48:58,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 19:48:59,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 19:48:59,110 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:48:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:48:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 27 times [2022-12-13 19:48:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:48:59,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230294721] [2022-12-13 19:48:59,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:48:59,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:48:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:00,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:00,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230294721] [2022-12-13 19:49:00,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230294721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:00,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262828092] [2022-12-13 19:49:00,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:49:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:00,614 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:00,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 19:49:01,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-13 19:49:01,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:01,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 123 conjunts are in the unsatisfiable core [2022-12-13 19:49:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:02,130 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 14 treesize of output 10 [2022-12-13 19:49:02,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:49:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:02,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:02,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:49:02,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:49:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:02,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262828092] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:02,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:02,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 69 [2022-12-13 19:49:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824752494] [2022-12-13 19:49:02,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:02,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-12-13 19:49:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-12-13 19:49:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 19:49:02,856 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:05,702 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2022-12-13 19:49:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 19:49:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 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 184 [2022-12-13 19:49:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:05,703 INFO L225 Difference]: With dead ends: 299 [2022-12-13 19:49:05,703 INFO L226 Difference]: Without dead ends: 192 [2022-12-13 19:49:05,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 339 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=575, Invalid=10981, Unknown=0, NotChecked=0, Total=11556 [2022-12-13 19:49:05,704 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 685 mSDsluCounter, 3300 mSDsCounter, 0 mSdLazyCounter, 5362 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 3373 SdHoareTripleChecker+Invalid, 5379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:05,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 3373 Invalid, 5379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5362 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 19:49:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-12-13 19:49:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-12-13 19:49:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-12-13 19:49:05,708 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-12-13 19:49:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:05,708 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-12-13 19:49:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 69 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-12-13 19:49:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-12-13 19:49:05,709 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:05,709 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:05,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 19:49:05,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 19:49:05,910 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:49:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:05,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2146904906, now seen corresponding path program 28 times [2022-12-13 19:49:05,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416398197] [2022-12-13 19:49:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:05,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416398197] [2022-12-13 19:49:07,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416398197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:07,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811366477] [2022-12-13 19:49:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:49:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:07,284 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:07,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 19:49:07,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:49:07,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:07,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 106 conjunts are in the unsatisfiable core [2022-12-13 19:49:07,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:07,708 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 [2022-12-13 19:49:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:08,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:11,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811366477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:11,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:11,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-12-13 19:49:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151863604] [2022-12-13 19:49:11,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:11,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-13 19:49:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-13 19:49:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=8673, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 19:49:11,264 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:12,994 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-12-13 19:49:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-13 19:49:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 0 states have call successors, (0), 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 188 [2022-12-13 19:49:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:12,995 INFO L225 Difference]: With dead ends: 200 [2022-12-13 19:49:12,995 INFO L226 Difference]: Without dead ends: 200 [2022-12-13 19:49:12,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3037, Invalid=11969, Unknown=0, NotChecked=0, Total=15006 [2022-12-13 19:49:12,996 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 755 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1823 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:12,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1823 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 19:49:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-13 19:49:12,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-12-13 19:49:12,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:13,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-12-13 19:49:13,000 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 188 [2022-12-13 19:49:13,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:13,000 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-12-13 19:49:13,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 4.55) internal successors, (455), 101 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:13,001 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-12-13 19:49:13,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-12-13 19:49:13,002 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:13,002 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:13,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 19:49:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:13,202 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:49:13,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:13,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2015965194, now seen corresponding path program 29 times [2022-12-13 19:49:13,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:13,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236552816] [2022-12-13 19:49:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:14,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236552816] [2022-12-13 19:49:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236552816] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366035835] [2022-12-13 19:49:14,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:49:14,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:14,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:14,873 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:14,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 19:49:15,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-12-13 19:49:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-13 19:49:15,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:15,189 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 [2022-12-13 19:49:15,879 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 14 treesize of output 10 [2022-12-13 19:49:22,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:49:22,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-12-13 19:49:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1112 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:22,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:24,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:49:24,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:49:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:27,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366035835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:27,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:27,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 131 [2022-12-13 19:49:27,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329032669] [2022-12-13 19:49:27,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:27,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-12-13 19:49:27,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-12-13 19:49:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=15641, Unknown=2, NotChecked=0, Total=17030 [2022-12-13 19:49:27,619 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:42,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:42,492 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2022-12-13 19:49:42,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-13 19:49:42,493 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 0 states have call successors, (0), 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 194 [2022-12-13 19:49:42,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:42,494 INFO L225 Difference]: With dead ends: 326 [2022-12-13 19:49:42,494 INFO L226 Difference]: Without dead ends: 213 [2022-12-13 19:49:42,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4694 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=4457, Invalid=28483, Unknown=2, NotChecked=0, Total=32942 [2022-12-13 19:49:42,495 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 2558 mSDsluCounter, 4302 mSDsCounter, 0 mSdLazyCounter, 7044 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2558 SdHoareTripleChecker+Valid, 4382 SdHoareTripleChecker+Invalid, 7046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7044 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:42,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2558 Valid, 4382 Invalid, 7046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7044 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-12-13 19:49:42,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-12-13 19:49:42,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2022-12-13 19:49:42,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0098039215686274) internal successors, (206), 204 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-12-13 19:49:42,498 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 194 [2022-12-13 19:49:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:42,499 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-12-13 19:49:42,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 4.396946564885496) internal successors, (576), 131 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-12-13 19:49:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-12-13 19:49:42,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:42,499 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:42,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 19:49:42,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:42,701 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:49:42,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:42,702 INFO L85 PathProgramCache]: Analyzing trace with hash 275169505, now seen corresponding path program 30 times [2022-12-13 19:49:42,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:42,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652551749] [2022-12-13 19:49:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:42,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:42,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:44,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652551749] [2022-12-13 19:49:44,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652551749] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015525036] [2022-12-13 19:49:44,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:49:44,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:44,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:44,865 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:44,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 19:49:46,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-12-13 19:49:46,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:49:46,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 135 conjunts are in the unsatisfiable core [2022-12-13 19:49:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:46,926 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 14 treesize of output 10 [2022-12-13 19:49:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:47,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:47,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:49:47,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:49:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:47,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015525036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:47,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:47,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 77 [2022-12-13 19:49:47,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111192679] [2022-12-13 19:49:47,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:47,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-13 19:49:47,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:47,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-13 19:49:47,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5653, Unknown=0, NotChecked=0, Total=5852 [2022-12-13 19:49:47,865 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:52,316 INFO L93 Difference]: Finished difference Result 331 states and 332 transitions. [2022-12-13 19:49:52,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 19:49:52,317 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 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 204 [2022-12-13 19:49:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:52,318 INFO L225 Difference]: With dead ends: 331 [2022-12-13 19:49:52,318 INFO L226 Difference]: Without dead ends: 212 [2022-12-13 19:49:52,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 375 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=638, Invalid=13642, Unknown=0, NotChecked=0, Total=14280 [2022-12-13 19:49:52,319 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 757 mSDsluCounter, 3974 mSDsCounter, 0 mSdLazyCounter, 6489 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 4055 SdHoareTripleChecker+Invalid, 6508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:52,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [757 Valid, 4055 Invalid, 6508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 6489 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 19:49:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-13 19:49:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2022-12-13 19:49:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:52,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-12-13 19:49:52,321 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2022-12-13 19:49:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:52,321 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-12-13 19:49:52,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.9740259740259742) internal successors, (306), 77 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:52,322 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-12-13 19:49:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-12-13 19:49:52,322 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:52,323 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:52,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 19:49:52,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-12-13 19:49:52,524 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:49:52,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:52,525 INFO L85 PathProgramCache]: Analyzing trace with hash -998454300, now seen corresponding path program 31 times [2022-12-13 19:49:52,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:52,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942095105] [2022-12-13 19:49:52,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:52,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:54,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:49:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942095105] [2022-12-13 19:49:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942095105] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:49:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598156798] [2022-12-13 19:49:54,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:49:54,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:49:54,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:49:54,261 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:49:54,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 19:49:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:49:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-13 19:49:54,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:49:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:49:56,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:49:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:49:56,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598156798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:49:56,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:49:56,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2022-12-13 19:49:56,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107865455] [2022-12-13 19:49:56,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:49:56,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-12-13 19:49:56,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:49:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-12-13 19:49:56,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=7356, Unknown=0, NotChecked=0, Total=8372 [2022-12-13 19:49:56,812 INFO L87 Difference]: Start difference. First operand 209 states and 210 transitions. Second operand has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:58,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:49:58,646 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2022-12-13 19:49:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-13 19:49:58,646 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 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 208 [2022-12-13 19:49:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:49:58,647 INFO L225 Difference]: With dead ends: 220 [2022-12-13 19:49:58,647 INFO L226 Difference]: Without dead ends: 220 [2022-12-13 19:49:58,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 347 SyntacticMatches, 21 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2439, Invalid=10901, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 19:49:58,648 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1235 mSDsluCounter, 2353 mSDsCounter, 0 mSdLazyCounter, 3995 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1235 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:49:58,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1235 Valid, 2440 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3995 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 19:49:58,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-13 19:49:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-12-13 19:49:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-12-13 19:49:58,650 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2022-12-13 19:49:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:49:58,650 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-12-13 19:49:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 4.626373626373627) internal successors, (421), 92 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:49:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-12-13 19:49:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-12-13 19:49:58,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:49:58,651 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:49:58,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 19:49:58,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 19:49:58,852 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:49:58,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:49:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -18445128, now seen corresponding path program 32 times [2022-12-13 19:49:58,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:49:58,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997075839] [2022-12-13 19:49:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:49:58,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:49:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:01,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:50:01,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997075839] [2022-12-13 19:50:01,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997075839] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:50:01,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85877224] [2022-12-13 19:50:01,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:50:01,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:01,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:50:01,159 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:50:01,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 19:50:01,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:50:01,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:50:01,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 124 conjunts are in the unsatisfiable core [2022-12-13 19:50:01,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:02,136 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 14 treesize of output 10 [2022-12-13 19:50:05,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:50:05,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:50:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:06,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:50:09,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:50:09,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:50:09,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-12-13 19:50:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:10,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85877224] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:50:10,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:50:10,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 124 [2022-12-13 19:50:10,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888974198] [2022-12-13 19:50:10,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:50:10,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-12-13 19:50:10,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:50:10,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-12-13 19:50:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1006, Invalid=14246, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 19:50:10,312 INFO L87 Difference]: Start difference. First operand 215 states and 216 transitions. Second operand has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:50:22,766 INFO L93 Difference]: Finished difference Result 358 states and 359 transitions. [2022-12-13 19:50:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 19:50:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 0 states have call successors, (0), 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 214 [2022-12-13 19:50:22,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:50:22,767 INFO L225 Difference]: With dead ends: 358 [2022-12-13 19:50:22,767 INFO L226 Difference]: Without dead ends: 233 [2022-12-13 19:50:22,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 332 SyntacticMatches, 21 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5423 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=3474, Invalid=28746, Unknown=0, NotChecked=0, Total=32220 [2022-12-13 19:50:22,768 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 2271 mSDsluCounter, 5761 mSDsCounter, 0 mSdLazyCounter, 9373 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2271 SdHoareTripleChecker+Valid, 5849 SdHoareTripleChecker+Invalid, 9377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:50:22,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2271 Valid, 5849 Invalid, 9377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9373 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-13 19:50:22,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-12-13 19:50:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2022-12-13 19:50:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:22,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-12-13 19:50:22,770 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 214 [2022-12-13 19:50:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:50:22,770 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-12-13 19:50:22,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 4.467741935483871) internal successors, (554), 124 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:22,770 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-12-13 19:50:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-12-13 19:50:22,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:50:22,771 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:50:22,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-13 19:50:22,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:22,972 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:50:22,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:22,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2008611953, now seen corresponding path program 33 times [2022-12-13 19:50:22,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:50:22,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848609012] [2022-12-13 19:50:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:22,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:50:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:50:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848609012] [2022-12-13 19:50:25,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848609012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:50:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9052098] [2022-12-13 19:50:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:50:25,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:25,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:50:25,201 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:50:25,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 19:50:26,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-12-13 19:50:26,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:50:26,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 147 conjunts are in the unsatisfiable core [2022-12-13 19:50:26,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:27,427 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 14 treesize of output 10 [2022-12-13 19:50:27,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:50:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:50:27,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:50:27,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:50:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:28,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9052098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:50:28,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:50:28,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 81 [2022-12-13 19:50:28,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996694617] [2022-12-13 19:50:28,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:50:28,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-12-13 19:50:28,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:50:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-12-13 19:50:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6275, Unknown=0, NotChecked=0, Total=6480 [2022-12-13 19:50:28,301 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:50:32,967 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2022-12-13 19:50:32,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-13 19:50:32,968 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 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 224 [2022-12-13 19:50:32,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:50:32,968 INFO L225 Difference]: With dead ends: 363 [2022-12-13 19:50:32,968 INFO L226 Difference]: Without dead ends: 232 [2022-12-13 19:50:32,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=679, Invalid=15577, Unknown=0, NotChecked=0, Total=16256 [2022-12-13 19:50:32,969 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 837 mSDsluCounter, 5092 mSDsCounter, 0 mSdLazyCounter, 8182 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 5181 SdHoareTripleChecker+Invalid, 8203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 8182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:50:32,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 5181 Invalid, 8203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 8182 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 19:50:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-12-13 19:50:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-12-13 19:50:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0087719298245614) internal successors, (230), 228 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-12-13 19:50:32,972 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-12-13 19:50:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:50:32,972 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-12-13 19:50:32,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 4.08641975308642) internal successors, (331), 81 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-12-13 19:50:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-12-13 19:50:32,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:50:32,977 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:50:32,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 19:50:33,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:33,178 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:50:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash 229928722, now seen corresponding path program 34 times [2022-12-13 19:50:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:50:33,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438404706] [2022-12-13 19:50:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:33,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:50:33,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:35,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:50:35,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438404706] [2022-12-13 19:50:35,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438404706] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:50:35,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893024434] [2022-12-13 19:50:35,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:50:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:50:35,535 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:50:35,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 19:50:36,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:50:36,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:50:36,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 126 conjunts are in the unsatisfiable core [2022-12-13 19:50:36,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:36,201 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 [2022-12-13 19:50:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:37,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:50:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:40,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893024434] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:50:40,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:50:40,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 120 [2022-12-13 19:50:40,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352250469] [2022-12-13 19:50:40,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:50:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-12-13 19:50:40,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:50:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-12-13 19:50:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=12475, Unknown=0, NotChecked=0, Total=14520 [2022-12-13 19:50:40,589 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:43,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:50:43,104 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2022-12-13 19:50:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-13 19:50:43,104 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 0 states have call successors, (0), 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 228 [2022-12-13 19:50:43,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:50:43,105 INFO L225 Difference]: With dead ends: 240 [2022-12-13 19:50:43,105 INFO L226 Difference]: Without dead ends: 240 [2022-12-13 19:50:43,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5958 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4313, Invalid=17149, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 19:50:43,106 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1341 mSDsluCounter, 2590 mSDsCounter, 0 mSdLazyCounter, 4354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 4355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:50:43,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 2685 Invalid, 4355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4354 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 19:50:43,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-13 19:50:43,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2022-12-13 19:50:43,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0085470085470085) internal successors, (236), 234 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:43,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-12-13 19:50:43,108 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 228 [2022-12-13 19:50:43,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:50:43,108 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-12-13 19:50:43,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 4.591666666666667) internal successors, (551), 121 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:50:43,108 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-12-13 19:50:43,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-12-13 19:50:43,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:50:43,109 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:50:43,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-13 19:50:43,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 19:50:43,310 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:50:43,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:50:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1542886758, now seen corresponding path program 35 times [2022-12-13 19:50:43,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:50:43,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360222913] [2022-12-13 19:50:43,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:50:43,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:50:43,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:50:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:50:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360222913] [2022-12-13 19:50:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360222913] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:50:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169266796] [2022-12-13 19:50:45,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:50:45,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:50:45,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:50:45,540 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:50:45,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-13 19:50:45,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-12-13 19:50:45,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:50:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 138 conjunts are in the unsatisfiable core [2022-12-13 19:50:45,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:50:46,001 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 [2022-12-13 19:50:46,930 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 14 treesize of output 10 [2022-12-13 19:50:50,322 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:50:50,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-12-13 19:50:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:50,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:50:54,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:50:54,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:50:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:50:58,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169266796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:50:58,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:50:58,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 155 [2022-12-13 19:50:58,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49585695] [2022-12-13 19:50:58,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:50:58,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-12-13 19:50:58,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:50:58,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-12-13 19:50:58,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1943, Invalid=21927, Unknown=0, NotChecked=0, Total=23870 [2022-12-13 19:50:58,078 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:51:32,847 INFO L93 Difference]: Finished difference Result 390 states and 391 transitions. [2022-12-13 19:51:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-12-13 19:51:32,848 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 0 states have call successors, (0), 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 234 [2022-12-13 19:51:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:51:32,848 INFO L225 Difference]: With dead ends: 390 [2022-12-13 19:51:32,848 INFO L226 Difference]: Without dead ends: 253 [2022-12-13 19:51:32,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6596 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=6089, Invalid=39493, Unknown=0, NotChecked=0, Total=45582 [2022-12-13 19:51:32,850 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 2068 mSDsluCounter, 6323 mSDsCounter, 0 mSdLazyCounter, 9869 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2068 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 9871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9869 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:51:32,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2068 Valid, 6419 Invalid, 9871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9869 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2022-12-13 19:51:32,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-13 19:51:32,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2022-12-13 19:51:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2022-12-13 19:51:32,852 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 234 [2022-12-13 19:51:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:51:32,852 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2022-12-13 19:51:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 4.490322580645161) internal successors, (696), 155 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2022-12-13 19:51:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-12-13 19:51:32,853 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:51:32,853 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:51:32,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-13 19:51:33,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 19:51:33,054 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:51:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:33,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1261679165, now seen corresponding path program 36 times [2022-12-13 19:51:33,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:51:33,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444830632] [2022-12-13 19:51:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:33,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:51:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:35,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444830632] [2022-12-13 19:51:35,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444830632] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:35,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763701128] [2022-12-13 19:51:35,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:51:35,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:35,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:35,594 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:35,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-13 19:51:37,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-12-13 19:51:37,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:51:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 157 conjunts are in the unsatisfiable core [2022-12-13 19:51:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:38,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-12-13 19:51:39,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:51:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:39,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:51:39,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:51:39,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:51:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:39,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763701128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:51:39,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:51:39,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 87 [2022-12-13 19:51:39,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190731443] [2022-12-13 19:51:39,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:51:39,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-13 19:51:39,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:51:39,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-13 19:51:39,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=7263, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 19:51:39,884 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:51:44,813 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2022-12-13 19:51:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-12-13 19:51:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 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 244 [2022-12-13 19:51:44,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:51:44,814 INFO L225 Difference]: With dead ends: 395 [2022-12-13 19:51:44,814 INFO L226 Difference]: Without dead ends: 252 [2022-12-13 19:51:44,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=731, Invalid=18175, Unknown=0, NotChecked=0, Total=18906 [2022-12-13 19:51:44,815 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 768 mSDsluCounter, 5320 mSDsCounter, 0 mSdLazyCounter, 8592 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 5417 SdHoareTripleChecker+Invalid, 8615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 8592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:51:44,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [768 Valid, 5417 Invalid, 8615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 8592 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-13 19:51:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-12-13 19:51:44,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-12-13 19:51:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-12-13 19:51:44,818 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2022-12-13 19:51:44,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:51:44,818 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-12-13 19:51:44,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 4.126436781609195) internal successors, (359), 87 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:44,818 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-12-13 19:51:44,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-12-13 19:51:44,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:51:44,819 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:51:44,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-13 19:51:45,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 19:51:45,021 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:51:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash 956513856, now seen corresponding path program 37 times [2022-12-13 19:51:45,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:51:45,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833187768] [2022-12-13 19:51:45,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:45,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:51:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:47,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:47,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833187768] [2022-12-13 19:51:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833187768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468297972] [2022-12-13 19:51:47,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:51:47,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:47,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:47,969 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:47,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-13 19:51:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 132 conjunts are in the unsatisfiable core [2022-12-13 19:51:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:49,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:49,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:51:51,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:51:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:52,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468297972] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:51:52,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:51:52,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 107 [2022-12-13 19:51:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218630436] [2022-12-13 19:51:52,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:51:52,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-12-13 19:51:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:51:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-12-13 19:51:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=10152, Unknown=0, NotChecked=0, Total=11556 [2022-12-13 19:51:52,353 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:51:55,200 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2022-12-13 19:51:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-13 19:51:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 0 states have call successors, (0), 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 248 [2022-12-13 19:51:55,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:51:55,201 INFO L225 Difference]: With dead ends: 260 [2022-12-13 19:51:55,201 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 19:51:55,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 415 SyntacticMatches, 25 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6829 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3345, Invalid=15015, Unknown=0, NotChecked=0, Total=18360 [2022-12-13 19:51:55,202 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1612 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 4811 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 3088 SdHoareTripleChecker+Invalid, 4812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 19:51:55,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 3088 Invalid, 4812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4811 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 19:51:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 19:51:55,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 255. [2022-12-13 19:51:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:55,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2022-12-13 19:51:55,204 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 248 [2022-12-13 19:51:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:51:55,205 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2022-12-13 19:51:55,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.682242990654205) internal successors, (501), 108 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:51:55,205 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2022-12-13 19:51:55,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-12-13 19:51:55,205 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:51:55,205 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:51:55,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-13 19:51:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-13 19:51:55,406 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:51:55,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:51:55,406 INFO L85 PathProgramCache]: Analyzing trace with hash 838164, now seen corresponding path program 38 times [2022-12-13 19:51:55,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:51:55,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701138872] [2022-12-13 19:51:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:51:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:51:55,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:51:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:51:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:51:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701138872] [2022-12-13 19:51:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701138872] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:51:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966184838] [2022-12-13 19:51:58,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:51:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:51:58,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:51:58,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:51:58,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-13 19:51:58,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:51:58,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:51:58,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 144 conjunts are in the unsatisfiable core [2022-12-13 19:51:58,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:51:59,243 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 14 treesize of output 10 [2022-12-13 19:52:03,456 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:52:03,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-12-13 19:52:03,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:03,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:07,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:52:07,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:52:07,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-12-13 19:52:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966184838] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:08,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:08,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 144 [2022-12-13 19:52:08,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078922015] [2022-12-13 19:52:08,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:08,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-12-13 19:52:08,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:08,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-12-13 19:52:08,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=19256, Unknown=0, NotChecked=0, Total=20592 [2022-12-13 19:52:08,110 INFO L87 Difference]: Start difference. First operand 255 states and 256 transitions. Second operand has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:18,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:52:24,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 19:52:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:52:27,287 INFO L93 Difference]: Finished difference Result 422 states and 423 transitions. [2022-12-13 19:52:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 19:52:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 0 states have call successors, (0), 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 254 [2022-12-13 19:52:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:52:27,288 INFO L225 Difference]: With dead ends: 422 [2022-12-13 19:52:27,288 INFO L226 Difference]: Without dead ends: 273 [2022-12-13 19:52:27,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 396 SyntacticMatches, 25 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7335 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=4544, Invalid=38512, Unknown=0, NotChecked=0, Total=43056 [2022-12-13 19:52:27,290 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 2215 mSDsluCounter, 7785 mSDsCounter, 0 mSdLazyCounter, 12276 mSolverCounterSat, 15 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2215 SdHoareTripleChecker+Valid, 7889 SdHoareTripleChecker+Invalid, 12293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 12276 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:52:27,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2215 Valid, 7889 Invalid, 12293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 12276 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2022-12-13 19:52:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-13 19:52:27,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 265. [2022-12-13 19:52:27,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0075757575757576) internal successors, (266), 264 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-12-13 19:52:27,292 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 254 [2022-12-13 19:52:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:52:27,292 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-12-13 19:52:27,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 4.569444444444445) internal successors, (658), 144 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-12-13 19:52:27,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-12-13 19:52:27,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:52:27,293 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:27,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-13 19:52:27,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:27,494 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:52:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:27,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1268757269, now seen corresponding path program 39 times [2022-12-13 19:52:27,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:27,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862157458] [2022-12-13 19:52:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:27,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:30,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:30,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862157458] [2022-12-13 19:52:30,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862157458] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:30,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621677135] [2022-12-13 19:52:30,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:52:30,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:30,332 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:30,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-13 19:52:33,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-12-13 19:52:33,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 171 conjunts are in the unsatisfiable core [2022-12-13 19:52:33,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:34,067 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 14 treesize of output 10 [2022-12-13 19:52:34,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:52:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:34,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:34,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:52:34,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:52:34,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:34,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621677135] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:34,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:34,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 93 [2022-12-13 19:52:34,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285620628] [2022-12-13 19:52:34,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:34,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-12-13 19:52:34,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:34,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-12-13 19:52:34,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8323, Unknown=0, NotChecked=0, Total=8556 [2022-12-13 19:52:34,995 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:52:41,051 INFO L93 Difference]: Finished difference Result 427 states and 428 transitions. [2022-12-13 19:52:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-12-13 19:52:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 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 264 [2022-12-13 19:52:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:52:41,053 INFO L225 Difference]: With dead ends: 427 [2022-12-13 19:52:41,053 INFO L226 Difference]: Without dead ends: 272 [2022-12-13 19:52:41,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=783, Invalid=20973, Unknown=0, NotChecked=0, Total=21756 [2022-12-13 19:52:41,054 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 828 mSDsluCounter, 6810 mSDsCounter, 0 mSdLazyCounter, 10824 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 6915 SdHoareTripleChecker+Invalid, 10849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 10824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:52:41,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 6915 Invalid, 10849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 10824 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-12-13 19:52:41,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-13 19:52:41,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2022-12-13 19:52:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.007462686567164) internal successors, (270), 268 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2022-12-13 19:52:41,057 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 264 [2022-12-13 19:52:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:52:41,057 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2022-12-13 19:52:41,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 4.161290322580645) internal successors, (387), 93 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2022-12-13 19:52:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-12-13 19:52:41,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:52:41,058 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:41,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-13 19:52:41,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-12-13 19:52:41,259 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:52:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416430, now seen corresponding path program 40 times [2022-12-13 19:52:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:41,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663298823] [2022-12-13 19:52:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:41,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1128 proven. 2174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:43,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663298823] [2022-12-13 19:52:43,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663298823] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:43,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586847944] [2022-12-13 19:52:43,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:52:43,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:43,973 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:43,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-13 19:52:45,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:52:45,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:52:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 146 conjunts are in the unsatisfiable core [2022-12-13 19:52:45,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:52:45,441 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 [2022-12-13 19:52:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:47,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:52:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:52,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586847944] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:52:52,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:52:52,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 140 [2022-12-13 19:52:52,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148383271] [2022-12-13 19:52:52,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:52:52,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-12-13 19:52:52,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:52:52,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-12-13 19:52:52,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=16965, Unknown=0, NotChecked=0, Total=19740 [2022-12-13 19:52:52,107 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:52:55,602 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2022-12-13 19:52:55,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-13 19:52:55,603 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 0 states have call successors, (0), 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 268 [2022-12-13 19:52:55,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:52:55,604 INFO L225 Difference]: With dead ends: 280 [2022-12-13 19:52:55,604 INFO L226 Difference]: Without dead ends: 280 [2022-12-13 19:52:55,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8240 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=5813, Invalid=23257, Unknown=0, NotChecked=0, Total=29070 [2022-12-13 19:52:55,605 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 2078 mSDsluCounter, 3620 mSDsCounter, 0 mSdLazyCounter, 6185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2078 SdHoareTripleChecker+Valid, 3731 SdHoareTripleChecker+Invalid, 6186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:52:55,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2078 Valid, 3731 Invalid, 6186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6185 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-12-13 19:52:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-12-13 19:52:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 275. [2022-12-13 19:52:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0072992700729928) internal successors, (276), 274 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2022-12-13 19:52:55,612 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 268 [2022-12-13 19:52:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:52:55,612 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2022-12-13 19:52:55,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 4.621428571428571) internal successors, (647), 141 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:52:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2022-12-13 19:52:55,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-13 19:52:55,613 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:52:55,613 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:52:55,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-13 19:52:55,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-12-13 19:52:55,814 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:52:55,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:52:55,815 INFO L85 PathProgramCache]: Analyzing trace with hash -388191550, now seen corresponding path program 41 times [2022-12-13 19:52:55,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:52:55,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136083869] [2022-12-13 19:52:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:52:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:52:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:52:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:52:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:52:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136083869] [2022-12-13 19:52:59,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136083869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:52:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136660777] [2022-12-13 19:52:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:52:59,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:52:59,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:52:59,063 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:52:59,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-13 19:53:03,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-12-13 19:53:03,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:53:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 177 conjunts are in the unsatisfiable core [2022-12-13 19:53:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:04,377 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 14 treesize of output 10 [2022-12-13 19:53:04,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:53:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:04,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:05,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:53:05,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:53:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:05,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136660777] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:05,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:53:05,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 96 [2022-12-13 19:53:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488992748] [2022-12-13 19:53:05,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:05,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-12-13 19:53:05,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:53:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-12-13 19:53:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=8880, Unknown=0, NotChecked=0, Total=9120 [2022-12-13 19:53:05,300 INFO L87 Difference]: Start difference. First operand 275 states and 276 transitions. Second operand has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:11,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:53:11,155 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2022-12-13 19:53:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-13 19:53:11,155 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 0 states have call successors, (0), 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 274 [2022-12-13 19:53:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:53:11,157 INFO L225 Difference]: With dead ends: 443 [2022-12-13 19:53:11,157 INFO L226 Difference]: Without dead ends: 282 [2022-12-13 19:53:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2430 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=809, Invalid=22447, Unknown=0, NotChecked=0, Total=23256 [2022-12-13 19:53:11,158 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1027 mSDsluCounter, 7218 mSDsCounter, 0 mSdLazyCounter, 11501 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 7327 SdHoareTripleChecker+Invalid, 11527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 11501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:53:11,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 7327 Invalid, 11527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 11501 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-13 19:53:11,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-13 19:53:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2022-12-13 19:53:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2022-12-13 19:53:11,160 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2022-12-13 19:53:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:53:11,160 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2022-12-13 19:53:11,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.177083333333333) internal successors, (401), 96 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2022-12-13 19:53:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-12-13 19:53:11,162 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:53:11,162 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:11,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-13 19:53:11,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:11,363 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:53:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1901490299, now seen corresponding path program 42 times [2022-12-13 19:53:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:53:11,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411335420] [2022-12-13 19:53:11,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:11,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:53:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1225 proven. 2339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:53:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411335420] [2022-12-13 19:53:13,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411335420] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:53:13,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555199186] [2022-12-13 19:53:13,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:53:13,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:53:13,974 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:53:13,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-13 19:53:19,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-12-13 19:53:19,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:53:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 121 conjunts are in the unsatisfiable core [2022-12-13 19:53:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:21,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:21,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:23,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-13 19:53:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:24,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555199186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:24,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:53:24,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59, 59] total 146 [2022-12-13 19:53:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451107979] [2022-12-13 19:53:24,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:24,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-12-13 19:53:24,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:53:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-12-13 19:53:24,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3301, Invalid=18161, Unknown=0, NotChecked=0, Total=21462 [2022-12-13 19:53:24,437 INFO L87 Difference]: Start difference. First operand 279 states and 280 transitions. Second operand has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:53:26,491 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2022-12-13 19:53:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-13 19:53:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 0 states have call successors, (0), 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 278 [2022-12-13 19:53:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:53:26,492 INFO L225 Difference]: With dead ends: 290 [2022-12-13 19:53:26,492 INFO L226 Difference]: Without dead ends: 290 [2022-12-13 19:53:26,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 439 SyntacticMatches, 28 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12417 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6139, Invalid=25367, Unknown=0, NotChecked=0, Total=31506 [2022-12-13 19:53:26,494 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1619 mSDsluCounter, 2092 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1619 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 3193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:53:26,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1619 Valid, 2207 Invalid, 3193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 19:53:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-13 19:53:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 285. [2022-12-13 19:53:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:26,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2022-12-13 19:53:26,496 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 278 [2022-12-13 19:53:26,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:53:26,496 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2022-12-13 19:53:26,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 146 states have (on average 4.917808219178082) internal successors, (718), 147 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:26,497 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2022-12-13 19:53:26,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-12-13 19:53:26,497 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:53:26,497 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:26,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-13 19:53:26,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:26,699 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:53:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:26,700 INFO L85 PathProgramCache]: Analyzing trace with hash 469783449, now seen corresponding path program 43 times [2022-12-13 19:53:26,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:53:26,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617926744] [2022-12-13 19:53:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:26,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:53:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:30,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:53:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617926744] [2022-12-13 19:53:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617926744] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:53:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209752931] [2022-12-13 19:53:30,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 19:53:30,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:30,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:53:30,042 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:53:30,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-13 19:53:30,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 183 conjunts are in the unsatisfiable core [2022-12-13 19:53:30,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:31,556 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 14 treesize of output 10 [2022-12-13 19:53:31,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:53:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:32,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:53:32,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:53:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:32,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209752931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:32,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:53:32,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2022-12-13 19:53:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852278724] [2022-12-13 19:53:32,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:32,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-12-13 19:53:32,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:53:32,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-12-13 19:53:32,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9455, Unknown=0, NotChecked=0, Total=9702 [2022-12-13 19:53:32,574 INFO L87 Difference]: Start difference. First operand 285 states and 286 transitions. Second operand has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:53:39,182 INFO L93 Difference]: Finished difference Result 459 states and 460 transitions. [2022-12-13 19:53:39,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-12-13 19:53:39,183 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 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 284 [2022-12-13 19:53:39,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:53:39,183 INFO L225 Difference]: With dead ends: 459 [2022-12-13 19:53:39,183 INFO L226 Difference]: Without dead ends: 292 [2022-12-13 19:53:39,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 529 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=835, Invalid=23971, Unknown=0, NotChecked=0, Total=24806 [2022-12-13 19:53:39,184 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 1062 mSDsluCounter, 7665 mSDsCounter, 0 mSdLazyCounter, 12157 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 7778 SdHoareTripleChecker+Invalid, 12184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 12157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 19:53:39,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 7778 Invalid, 12184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 12157 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 19:53:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-13 19:53:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2022-12-13 19:53:39,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0069444444444444) internal successors, (290), 288 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-12-13 19:53:39,187 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2022-12-13 19:53:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:53:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-12-13 19:53:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 4.191919191919192) internal successors, (415), 99 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-12-13 19:53:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-12-13 19:53:39,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:53:39,188 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:39,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-13 19:53:39,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-13 19:53:39,389 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:53:39,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:39,390 INFO L85 PathProgramCache]: Analyzing trace with hash 204759196, now seen corresponding path program 44 times [2022-12-13 19:53:39,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:53:39,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492408014] [2022-12-13 19:53:39,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:39,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:53:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1326 proven. 2510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:53:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492408014] [2022-12-13 19:53:42,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492408014] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:53:42,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550117624] [2022-12-13 19:53:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:53:42,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:42,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:53:42,339 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:53:42,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-13 19:53:42,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:53:42,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:53:42,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 152 conjunts are in the unsatisfiable core [2022-12-13 19:53:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:53:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:44,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:53:46,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-13 19:53:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:47,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550117624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:53:47,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:53:47,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 123 [2022-12-13 19:53:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912166585] [2022-12-13 19:53:47,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:53:47,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-12-13 19:53:47,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:53:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-12-13 19:53:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1856, Invalid=13396, Unknown=0, NotChecked=0, Total=15252 [2022-12-13 19:53:47,447 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:53:51,278 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2022-12-13 19:53:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-13 19:53:51,279 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 0 states have call successors, (0), 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 288 [2022-12-13 19:53:51,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:53:51,280 INFO L225 Difference]: With dead ends: 300 [2022-12-13 19:53:51,280 INFO L226 Difference]: Without dead ends: 300 [2022-12-13 19:53:51,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 29 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9143 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4395, Invalid=19785, Unknown=0, NotChecked=0, Total=24180 [2022-12-13 19:53:51,282 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 1672 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 6836 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1672 SdHoareTripleChecker+Valid, 4262 SdHoareTripleChecker+Invalid, 6837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:53:51,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1672 Valid, 4262 Invalid, 6837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6836 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-13 19:53:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-12-13 19:53:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2022-12-13 19:53:51,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0068027210884354) internal successors, (296), 294 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-12-13 19:53:51,290 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 288 [2022-12-13 19:53:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:53:51,290 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-12-13 19:53:51,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 4.723577235772358) internal successors, (581), 124 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:53:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-12-13 19:53:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-12-13 19:53:51,292 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:53:51,292 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:53:51,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-13 19:53:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 19:53:51,492 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:53:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:53:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash -2129021072, now seen corresponding path program 45 times [2022-12-13 19:53:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:53:51,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892340421] [2022-12-13 19:53:51,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:53:51,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:53:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:53:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:53:54,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:53:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892340421] [2022-12-13 19:53:54,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892340421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:53:54,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469911026] [2022-12-13 19:53:54,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:53:54,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:53:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:53:54,985 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:53:54,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-13 19:54:00,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-12-13 19:54:00,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:00,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 187 conjunts are in the unsatisfiable core [2022-12-13 19:54:00,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:02,147 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 14 treesize of output 10 [2022-12-13 19:54:02,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:54:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:02,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:02,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:54:02,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:54:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:03,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469911026] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:03,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:03,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-12-13 19:54:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343065999] [2022-12-13 19:54:03,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:03,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-12-13 19:54:03,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:03,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-12-13 19:54:03,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=10048, Unknown=0, NotChecked=0, Total=10302 [2022-12-13 19:54:03,135 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:11,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:11,427 INFO L93 Difference]: Finished difference Result 475 states and 476 transitions. [2022-12-13 19:54:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-12-13 19:54:11,427 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 0 states have call successors, (0), 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 294 [2022-12-13 19:54:11,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:11,429 INFO L225 Difference]: With dead ends: 475 [2022-12-13 19:54:11,429 INFO L226 Difference]: Without dead ends: 302 [2022-12-13 19:54:11,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 548 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=861, Invalid=25545, Unknown=0, NotChecked=0, Total=26406 [2022-12-13 19:54:11,430 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1096 mSDsluCounter, 9034 mSDsCounter, 0 mSdLazyCounter, 14325 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 9151 SdHoareTripleChecker+Invalid, 14353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 14325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:11,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1096 Valid, 9151 Invalid, 14353 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 14325 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-12-13 19:54:11,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-12-13 19:54:11,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 299. [2022-12-13 19:54:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0067114093959733) internal successors, (300), 298 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-12-13 19:54:11,433 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2022-12-13 19:54:11,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:11,433 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-12-13 19:54:11,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.205882352941177) internal successors, (429), 102 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:11,433 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-12-13 19:54:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-12-13 19:54:11,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:11,434 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:11,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-13 19:54:11,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-13 19:54:11,635 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:54:11,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:11,636 INFO L85 PathProgramCache]: Analyzing trace with hash 470785203, now seen corresponding path program 46 times [2022-12-13 19:54:11,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:11,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515098525] [2022-12-13 19:54:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:11,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1431 proven. 2687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:14,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:14,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515098525] [2022-12-13 19:54:14,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515098525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:14,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990588307] [2022-12-13 19:54:14,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:54:14,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:14,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:14,683 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:14,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-13 19:54:15,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 19:54:15,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:15,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 161 conjunts are in the unsatisfiable core [2022-12-13 19:54:15,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:15,975 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 [2022-12-13 19:54:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:17,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:21,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990588307] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:21,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:21,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 155 [2022-12-13 19:54:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309970986] [2022-12-13 19:54:21,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:21,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-12-13 19:54:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-12-13 19:54:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3396, Invalid=20784, Unknown=0, NotChecked=0, Total=24180 [2022-12-13 19:54:21,745 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:25,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:25,725 INFO L93 Difference]: Finished difference Result 310 states and 311 transitions. [2022-12-13 19:54:25,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 19:54:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 0 states have call successors, (0), 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 298 [2022-12-13 19:54:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:25,726 INFO L225 Difference]: With dead ends: 310 [2022-12-13 19:54:25,726 INFO L226 Difference]: Without dead ends: 310 [2022-12-13 19:54:25,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=7085, Invalid=28447, Unknown=0, NotChecked=0, Total=35532 [2022-12-13 19:54:25,728 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2105 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 6714 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2105 SdHoareTripleChecker+Valid, 4301 SdHoareTripleChecker+Invalid, 6715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:25,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2105 Valid, 4301 Invalid, 6715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6714 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-13 19:54:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-13 19:54:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2022-12-13 19:54:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.006578947368421) internal successors, (306), 304 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:25,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2022-12-13 19:54:25,730 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 298 [2022-12-13 19:54:25,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:25,730 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2022-12-13 19:54:25,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 4.638709677419355) internal successors, (719), 156 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:25,730 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2022-12-13 19:54:25,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-12-13 19:54:25,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:25,731 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:25,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-13 19:54:25,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 19:54:25,932 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:54:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1220065721, now seen corresponding path program 47 times [2022-12-13 19:54:25,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:25,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135056125] [2022-12-13 19:54:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135056125] [2022-12-13 19:54:29,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135056125] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:29,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529834259] [2022-12-13 19:54:29,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 19:54:29,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:29,866 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:29,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-13 19:54:31,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-12-13 19:54:31,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:31,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 195 conjunts are in the unsatisfiable core [2022-12-13 19:54:31,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:32,913 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 14 treesize of output 10 [2022-12-13 19:54:33,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 19:54:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:33,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:33,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-12-13 19:54:33,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-13 19:54:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:33,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529834259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:33,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:33,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 105 [2022-12-13 19:54:33,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867644105] [2022-12-13 19:54:33,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:33,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-12-13 19:54:33,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:33,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-12-13 19:54:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10659, Unknown=0, NotChecked=0, Total=10920 [2022-12-13 19:54:33,942 INFO L87 Difference]: Start difference. First operand 305 states and 306 transitions. Second operand has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:42,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:54:42,030 INFO L93 Difference]: Finished difference Result 491 states and 492 transitions. [2022-12-13 19:54:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-13 19:54:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 0 states have call successors, (0), 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 304 [2022-12-13 19:54:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:54:42,032 INFO L225 Difference]: With dead ends: 491 [2022-12-13 19:54:42,032 INFO L226 Difference]: Without dead ends: 312 [2022-12-13 19:54:42,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 567 SyntacticMatches, 3 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=887, Invalid=27169, Unknown=0, NotChecked=0, Total=28056 [2022-12-13 19:54:42,033 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 956 mSDsluCounter, 9366 mSDsCounter, 0 mSdLazyCounter, 14846 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 956 SdHoareTripleChecker+Valid, 9487 SdHoareTripleChecker+Invalid, 14875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 14846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-13 19:54:42,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [956 Valid, 9487 Invalid, 14875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 14846 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-13 19:54:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-13 19:54:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-12-13 19:54:42,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 1.0064935064935066) internal successors, (310), 308 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2022-12-13 19:54:42,036 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 304 [2022-12-13 19:54:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:54:42,037 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2022-12-13 19:54:42,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 4.219047619047619) internal successors, (443), 105 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:54:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2022-12-13 19:54:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-12-13 19:54:42,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:54:42,038 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:54:42,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-13 19:54:42,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:42,239 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-13 19:54:42,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:54:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1874703306, now seen corresponding path program 48 times [2022-12-13 19:54:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:54:42,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071457650] [2022-12-13 19:54:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:54:42,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:54:42,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:54:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 1540 proven. 2870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:54:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:54:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071457650] [2022-12-13 19:54:46,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071457650] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 19:54:46,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044896113] [2022-12-13 19:54:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 19:54:46,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:54:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:54:46,413 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:54:46,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-13 19:54:50,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-12-13 19:54:50,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:54:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-13 19:54:50,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:54:50,337 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 [2022-12-13 19:54:50,977 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 16 treesize of output 12 [2022-12-13 19:54:53,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 19:54:53,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-12-13 19:54:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 682 proven. 241 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-12-13 19:54:53,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:54:55,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-12-13 19:54:55,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-12-13 19:54:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 726 proven. 197 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-12-13 19:54:56,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044896113] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:54:56,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 19:54:56,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-12-13 19:54:56,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744941853] [2022-12-13 19:54:56,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 19:54:56,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-12-13 19:54:56,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:54:56,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-12-13 19:54:56,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=6527, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 19:54:56,249 INFO L87 Difference]: Start difference. First operand 309 states and 310 transitions. Second operand has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:55:06,453 INFO L93 Difference]: Finished difference Result 313 states and 314 transitions. [2022-12-13 19:55:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-12-13 19:55:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 0 states have call successors, (0), 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 308 [2022-12-13 19:55:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:55:06,454 INFO L225 Difference]: With dead ends: 313 [2022-12-13 19:55:06,454 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 19:55:06,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 593 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=5259, Invalid=18303, Unknown=0, NotChecked=0, Total=23562 [2022-12-13 19:55:06,455 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 1758 mSDsluCounter, 3491 mSDsCounter, 0 mSdLazyCounter, 5011 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1758 SdHoareTripleChecker+Valid, 3616 SdHoareTripleChecker+Invalid, 5074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 5011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-13 19:55:06,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1758 Valid, 3616 Invalid, 5074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 5011 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-13 19:55:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 19:55:06,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 19:55:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:06,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 19:55:06,456 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 308 [2022-12-13 19:55:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:55:06,456 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 19:55:06,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.255813953488372) internal successors, (366), 87 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:55:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 19:55:06,456 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-12-13 19:55:06,458 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2022-12-13 19:55:06,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2022-12-13 19:55:06,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2022-12-13 19:55:06,459 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-12-13 19:55:06,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-13 19:55:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:55:06,665 INFO L445 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:55:06,667 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 19:55:06,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 07:55:06 BoogieIcfgContainer [2022-12-13 19:55:06,669 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 19:55:06,669 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 19:55:06,669 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 19:55:06,669 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 19:55:06,670 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:45:48" (3/4) ... [2022-12-13 19:55:06,672 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 19:55:06,679 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-12-13 19:55:06,679 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-12-13 19:55:06,679 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 19:55:06,679 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 19:55:06,700 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 19:55:06,700 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 19:55:06,701 INFO L158 Benchmark]: Toolchain (without parser) took 559064.20ms. Allocated memory was 102.8MB in the beginning and 488.6MB in the end (delta: 385.9MB). Free memory was 63.4MB in the beginning and 260.6MB in the end (delta: -197.1MB). Peak memory consumption was 190.2MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.80ms. Allocated memory is still 102.8MB. Free memory was 63.2MB in the beginning and 47.4MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.17ms. Allocated memory is still 102.8MB. Free memory was 47.4MB in the beginning and 45.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: Boogie Preprocessor took 17.09ms. Allocated memory is still 102.8MB. Free memory was 45.4MB in the beginning and 44.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: RCFGBuilder took 280.71ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 44.1MB in the beginning and 97.6MB in the end (delta: -53.5MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: TraceAbstraction took 558429.13ms. Allocated memory was 132.1MB in the beginning and 488.6MB in the end (delta: 356.5MB). Free memory was 96.6MB in the beginning and 263.2MB in the end (delta: -166.5MB). Peak memory consumption was 189.0MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L158 Benchmark]: Witness Printer took 31.32ms. Allocated memory is still 488.6MB. Free memory was 263.2MB in the beginning and 260.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 19:55:06,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 102.8MB. Free memory is still 71.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.80ms. Allocated memory is still 102.8MB. Free memory was 63.2MB in the beginning and 47.4MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.17ms. Allocated memory is still 102.8MB. Free memory was 47.4MB in the beginning and 45.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.09ms. Allocated memory is still 102.8MB. Free memory was 45.4MB in the beginning and 44.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 280.71ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 44.1MB in the beginning and 97.6MB in the end (delta: -53.5MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * TraceAbstraction took 558429.13ms. Allocated memory was 132.1MB in the beginning and 488.6MB in the end (delta: 356.5MB). Free memory was 96.6MB in the beginning and 263.2MB in the end (delta: -166.5MB). Peak memory consumption was 189.0MB. Max. memory is 16.1GB. * Witness Printer took 31.32ms. Allocated memory is still 488.6MB. Free memory was 263.2MB in the beginning and 260.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 558.4s, OverallIterations: 61, TraceHistogramMax: 30, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.0s, AutomataDifference: 282.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 mSolverCounterUnknown, 48072 SdHoareTripleChecker+Valid, 107.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48072 mSDsluCounter, 140305 SdHoareTripleChecker+Invalid, 96.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 136788 mSDsCounter, 456 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 222339 IncrementalHoareTripleChecker+Invalid, 222813 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 456 mSolverCounterUnsat, 3517 mSDtfsCounter, 222339 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19237 GetRequests, 13592 SyntacticMatches, 294 SemanticMatches, 5351 ConstructedPredicates, 0 IntricatePredicates, 34 DeprecatedPredicates, 139011 ImplicationChecksByTransitivity, 309.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=309occurred in iteration=60, InterpolantAutomatonStates: 2458, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 61 MinimizatonAttempts, 393 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 35.3s SatisfiabilityAnalysisTime, 225.5s InterpolantComputationTime, 16007 NumberOfCodeBlocks, 16007 NumberOfCodeBlocksAsserted, 531 NumberOfCheckSat, 23796 ConstructedInterpolants, 1415 QuantifiedInterpolants, 256126 SizeOfPredicates, 584 NumberOfNonLiveVariables, 28361 ConjunctsInSsa, 4782 ConjunctsInUnsatCore, 159 InterpolantComputations, 12 PerfectInterpolantSequences, 51948/228025 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-12-13 19:55:06,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b402772b-7c4a-43d1-b0bc-c0bff336bd39/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE