./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 8393723b 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_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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-8393723 [2022-11-18 20:45:16,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:45:16,293 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:45:16,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:45:16,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:45:16,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:45:16,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:45:16,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:45:16,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:45:16,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:45:16,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:45:16,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:45:16,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:45:16,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:45:16,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:45:16,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:45:16,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:45:16,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:45:16,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:45:16,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:45:16,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:45:16,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:45:16,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:45:16,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:45:16,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:45:16,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:45:16,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:45:16,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:45:16,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:45:16,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:45:16,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:45:16,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:45:16,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:45:16,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:45:16,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:45:16,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:45:16,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:45:16,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:45:16,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:45:16,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:45:16,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:45:16,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:45:16,387 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:45:16,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:45:16,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:45:16,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:45:16,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:45:16,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:45:16,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:45:16,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:45:16,390 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:45:16,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:45:16,390 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:45:16,390 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:45:16,391 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:45:16,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:45:16,392 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:45:16,392 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:45:16,392 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:45:16,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:45:16,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:45:16,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:45:16,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:16,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:45:16,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:45:16,394 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:45:16,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:45:16,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2022-11-18 20:45:16,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:45:16,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:45:16,665 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:45:16,666 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:45:16,667 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:45:16,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-11-18 20:45:16,739 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/data/7d050af74/bcdb5aad36344cc6845ec5d43cb3ec3a/FLAG2945e24dc [2022-11-18 20:45:17,209 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:45:17,210 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2022-11-18 20:45:17,225 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/data/7d050af74/bcdb5aad36344cc6845ec5d43cb3ec3a/FLAG2945e24dc [2022-11-18 20:45:17,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/data/7d050af74/bcdb5aad36344cc6845ec5d43cb3ec3a [2022-11-18 20:45:17,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:45:17,565 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:45:17,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:17,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:45:17,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:45:17,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:17" (1/1) ... [2022-11-18 20:45:17,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39334b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:17, skipping insertion in model container [2022-11-18 20:45:17,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:45:17" (1/1) ... [2022-11-18 20:45:17,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:45:17,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:45:17,935 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:17,944 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:45:17,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:45:18,011 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:45:18,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18 WrapperNode [2022-11-18 20:45:18,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:45:18,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:18,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:45:18,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:45:18,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,051 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-11-18 20:45:18,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:45:18,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:45:18,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:45:18,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:45:18,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,099 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:45:18,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:45:18,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:45:18,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:45:18,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (1/1) ... [2022-11-18 20:45:18,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:45:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:18,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:45:18,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:45:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:45:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:45:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:45:18,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:45:18,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:45:18,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:45:18,317 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:45:18,319 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:45:18,504 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:45:18,510 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:45:18,510 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:45:18,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:18 BoogieIcfgContainer [2022-11-18 20:45:18,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:45:18,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:45:18,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:45:18,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:45:18,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:45:17" (1/3) ... [2022-11-18 20:45:18,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7b2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:18, skipping insertion in model container [2022-11-18 20:45:18,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:45:18" (2/3) ... [2022-11-18 20:45:18,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7b2ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:45:18, skipping insertion in model container [2022-11-18 20:45:18,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:18" (3/3) ... [2022-11-18 20:45:18,521 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2022-11-18 20:45:18,539 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:45:18,539 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-18 20:45:18,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:45:18,609 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@60d79be1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:45:18,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-18 20:45:18,614 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) [2022-11-18 20:45:18,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:45:18,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:18,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:45:18,622 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)] === [2022-11-18 20:45:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:18,627 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-18 20:45:18,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:18,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327610036] [2022-11-18 20:45:18,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:18,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:18,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327610036] [2022-11-18 20:45:18,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327610036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:18,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:18,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:18,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549246311] [2022-11-18 20:45:18,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:18,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:18,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:18,972 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) [2022-11-18 20:45:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:19,018 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-18 20:45:19,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:45:19,021 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 [2022-11-18 20:45:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:19,030 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:45:19,030 INFO L226 Difference]: Without dead ends: 54 [2022-11-18 20:45:19,032 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 [2022-11-18 20:45:19,035 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 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 [2022-11-18 20:45:19,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:45:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-18 20:45:19,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-11-18 20:45:19,068 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) [2022-11-18 20:45:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-18 20:45:19,070 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-11-18 20:45:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:19,071 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-18 20:45:19,071 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) [2022-11-18 20:45:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-18 20:45:19,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:45:19,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:19,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:45:19,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:45:19,073 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)] === [2022-11-18 20:45:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-11-18 20:45:19,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:19,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943399377] [2022-11-18 20:45:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:19,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:19,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943399377] [2022-11-18 20:45:19,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943399377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:19,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:19,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:45:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166638001] [2022-11-18 20:45:19,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:45:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:45:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:45:19,154 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) [2022-11-18 20:45:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:19,192 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-11-18 20:45:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:45:19,193 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 [2022-11-18 20:45:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:19,194 INFO L225 Difference]: With dead ends: 31 [2022-11-18 20:45:19,194 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 20:45:19,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:45:19,196 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 [2022-11-18 20:45:19,197 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] [2022-11-18 20:45:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 20:45:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 20:45:19,201 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) [2022-11-18 20:45:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-18 20:45:19,205 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-11-18 20:45:19,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:19,206 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-18 20:45:19,206 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) [2022-11-18 20:45:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-18 20:45:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:45:19,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:19,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:45:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:45:19,208 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)] === [2022-11-18 20:45:19,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:19,209 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-11-18 20:45:19,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:19,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230050441] [2022-11-18 20:45:19,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:19,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:19,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:19,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:19,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230050441] [2022-11-18 20:45:19,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230050441] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:19,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:19,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:45:19,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177300553] [2022-11-18 20:45:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:19,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:19,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:19,523 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) [2022-11-18 20:45:19,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:19,612 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-18 20:45:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:45:19,613 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 [2022-11-18 20:45:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:19,614 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:45:19,614 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:45:19,614 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 [2022-11-18 20:45:19,616 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:19,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:45:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-11-18 20:45:19,620 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) [2022-11-18 20:45:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-18 20:45:19,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2022-11-18 20:45:19,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:19,622 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-18 20:45:19,622 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) [2022-11-18 20:45:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-18 20:45:19,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:45:19,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:19,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:45:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:45:19,624 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)] === [2022-11-18 20:45:19,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:19,625 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-18 20:45:19,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:19,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128277253] [2022-11-18 20:45:19,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:19,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:19,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128277253] [2022-11-18 20:45:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128277253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:19,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:19,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492481363] [2022-11-18 20:45:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:45:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:45:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:19,870 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) [2022-11-18 20:45:19,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:19,967 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-18 20:45:19,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:45:19,968 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 [2022-11-18 20:45:19,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:19,969 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:45:19,969 INFO L226 Difference]: Without dead ends: 56 [2022-11-18 20:45:19,970 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 [2022-11-18 20:45:19,971 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 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 [2022-11-18 20:45:19,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-18 20:45:19,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-11-18 20:45:19,977 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) [2022-11-18 20:45:19,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-18 20:45:19,978 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-18 20:45:19,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:19,978 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-18 20:45:19,979 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) [2022-11-18 20:45:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-18 20:45:19,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-18 20:45:19,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:19,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-18 20:45:19,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:45:19,980 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)] === [2022-11-18 20:45:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-11-18 20:45:19,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:19,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656255626] [2022-11-18 20:45:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:19,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:20,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:20,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:20,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656255626] [2022-11-18 20:45:20,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656255626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:20,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:20,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:45:20,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366265905] [2022-11-18 20:45:20,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:20,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:45:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:45:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:20,173 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) [2022-11-18 20:45:20,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:20,301 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-18 20:45:20,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:45:20,302 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 [2022-11-18 20:45:20,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:20,303 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:45:20,303 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:45:20,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:45:20,305 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:20,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 45 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:45:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2022-11-18 20:45:20,321 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) [2022-11-18 20:45:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-18 20:45:20,325 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-18 20:45:20,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:20,325 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-18 20:45:20,326 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) [2022-11-18 20:45:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-18 20:45:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:45:20,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:20,330 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:20,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:45:20,331 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)] === [2022-11-18 20:45:20,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-11-18 20:45:20,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:20,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913869845] [2022-11-18 20:45:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:20,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913869845] [2022-11-18 20:45:20,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913869845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:20,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:20,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:45:20,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955230401] [2022-11-18 20:45:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:20,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:20,416 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) [2022-11-18 20:45:20,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:20,464 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-18 20:45:20,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:45:20,465 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 [2022-11-18 20:45:20,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:20,466 INFO L225 Difference]: With dead ends: 31 [2022-11-18 20:45:20,467 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 20:45:20,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:45:20,469 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 [2022-11-18 20:45:20,472 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] [2022-11-18 20:45:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 20:45:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 20:45:20,481 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) [2022-11-18 20:45:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-18 20:45:20,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2022-11-18 20:45:20,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:20,484 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-18 20:45:20,485 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) [2022-11-18 20:45:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-18 20:45:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-18 20:45:20,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:20,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:20,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:45:20,486 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)] === [2022-11-18 20:45:20,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:20,487 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-11-18 20:45:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:20,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189467886] [2022-11-18 20:45:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:20,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:20,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189467886] [2022-11-18 20:45:20,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189467886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:20,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:20,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:45:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631943088] [2022-11-18 20:45:20,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:20,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:45:20,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:45:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:45:20,679 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) [2022-11-18 20:45:20,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:20,758 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-18 20:45:20,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:45:20,759 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 [2022-11-18 20:45:20,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:20,760 INFO L225 Difference]: With dead ends: 42 [2022-11-18 20:45:20,760 INFO L226 Difference]: Without dead ends: 42 [2022-11-18 20:45:20,761 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 [2022-11-18 20:45:20,761 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:20,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-18 20:45:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-11-18 20:45:20,765 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) [2022-11-18 20:45:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-11-18 20:45:20,766 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 8 [2022-11-18 20:45:20,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:20,766 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-11-18 20:45:20,766 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) [2022-11-18 20:45:20,767 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-11-18 20:45:20,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:45:20,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:20,767 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:20,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:45:20,768 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)] === [2022-11-18 20:45:20,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-18 20:45:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:20,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980522911] [2022-11-18 20:45:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:20,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:21,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:21,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980522911] [2022-11-18 20:45:21,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980522911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:21,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132151272] [2022-11-18 20:45:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:21,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:21,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:21,070 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:45:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:45:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:21,252 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 [2022-11-18 20:45:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:21,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:21,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:21,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132151272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:21,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:21,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-18 20:45:21,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335188023] [2022-11-18 20:45:21,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:21,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:45:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:45:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:45:21,899 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) [2022-11-18 20:45:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:22,273 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-18 20:45:22,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:45:22,274 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 [2022-11-18 20:45:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:22,275 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:45:22,275 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:45:22,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:45:22,276 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 275 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:22,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 131 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:45:22,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:45:22,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 36. [2022-11-18 20:45:22,279 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) [2022-11-18 20:45:22,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-18 20:45:22,280 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 10 [2022-11-18 20:45:22,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:22,280 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-18 20:45:22,280 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) [2022-11-18 20:45:22,281 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-18 20:45:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:45:22,281 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:22,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:22,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:22,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:45:22,488 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)] === [2022-11-18 20:45:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556842, now seen corresponding path program 1 times [2022-11-18 20:45:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:22,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520586781] [2022-11-18 20:45:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:22,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520586781] [2022-11-18 20:45:22,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520586781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:22,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:22,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:45:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953913606] [2022-11-18 20:45:22,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:45:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:45:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:45:22,699 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) [2022-11-18 20:45:22,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:22,741 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-18 20:45:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:45:22,742 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 [2022-11-18 20:45:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:22,742 INFO L225 Difference]: With dead ends: 35 [2022-11-18 20:45:22,742 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 20:45:22,743 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 [2022-11-18 20:45:22,745 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:22,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:45:22,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 20:45:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-18 20:45:22,748 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) [2022-11-18 20:45:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2022-11-18 20:45:22,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 10 [2022-11-18 20:45:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:22,749 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2022-11-18 20:45:22,749 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) [2022-11-18 20:45:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2022-11-18 20:45:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-18 20:45:22,750 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:22,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:45:22,751 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)] === [2022-11-18 20:45:22,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:22,751 INFO L85 PathProgramCache]: Analyzing trace with hash -204603407, now seen corresponding path program 1 times [2022-11-18 20:45:22,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:22,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454075958] [2022-11-18 20:45:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454075958] [2022-11-18 20:45:22,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454075958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:22,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:22,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:45:22,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275594109] [2022-11-18 20:45:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:45:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:45:22,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:45:22,777 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) [2022-11-18 20:45:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:22,786 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-11-18 20:45:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:45:22,787 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 [2022-11-18 20:45:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:22,788 INFO L225 Difference]: With dead ends: 35 [2022-11-18 20:45:22,788 INFO L226 Difference]: Without dead ends: 35 [2022-11-18 20:45:22,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:45:22,789 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 [2022-11-18 20:45:22,790 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] [2022-11-18 20:45:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-18 20:45:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-18 20:45:22,794 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) [2022-11-18 20:45:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2022-11-18 20:45:22,795 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2022-11-18 20:45:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:22,795 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2022-11-18 20:45:22,796 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) [2022-11-18 20:45:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2022-11-18 20:45:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:45:22,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:22,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:45:22,797 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)] === [2022-11-18 20:45:22,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:22,798 INFO L85 PathProgramCache]: Analyzing trace with hash 938762030, now seen corresponding path program 1 times [2022-11-18 20:45:22,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:22,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804709433] [2022-11-18 20:45:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:22,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:23,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:23,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:23,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804709433] [2022-11-18 20:45:23,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804709433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:23,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:23,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 20:45:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160725462] [2022-11-18 20:45:23,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:23,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:45:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:45:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:45:23,072 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) [2022-11-18 20:45:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:23,191 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-11-18 20:45:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:45:23,192 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 [2022-11-18 20:45:23,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:23,193 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:45:23,193 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:45:23,194 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 [2022-11-18 20:45:23,195 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:23,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 97 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:23,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:45:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-18 20:45:23,203 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) [2022-11-18 20:45:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-18 20:45:23,203 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 14 [2022-11-18 20:45:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:23,204 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-18 20:45:23,205 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) [2022-11-18 20:45:23,205 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-18 20:45:23,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-18 20:45:23,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:23,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:23,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 20:45:23,207 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)] === [2022-11-18 20:45:23,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:23,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1196927468, now seen corresponding path program 1 times [2022-11-18 20:45:23,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:23,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822818659] [2022-11-18 20:45:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:23,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:23,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:23,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822818659] [2022-11-18 20:45:23,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822818659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:23,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:23,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-18 20:45:23,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299389408] [2022-11-18 20:45:23,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:23,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:45:23,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:23,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:45:23,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:45:23,480 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) [2022-11-18 20:45:23,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:23,644 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-18 20:45:23,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:45:23,645 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 [2022-11-18 20:45:23,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:23,646 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:45:23,646 INFO L226 Difference]: Without dead ends: 55 [2022-11-18 20:45:23,646 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 [2022-11-18 20:45:23,647 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:23,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 98 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-18 20:45:23,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2022-11-18 20:45:23,659 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) [2022-11-18 20:45:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-18 20:45:23,661 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 14 [2022-11-18 20:45:23,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:23,661 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-18 20:45:23,662 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) [2022-11-18 20:45:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-18 20:45:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:45:23,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:23,664 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:45:23,664 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)] === [2022-11-18 20:45:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -782696489, now seen corresponding path program 1 times [2022-11-18 20:45:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:23,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24131353] [2022-11-18 20:45:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:23,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:23,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:23,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24131353] [2022-11-18 20:45:23,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24131353] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:45:23,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:45:23,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:45:23,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515284142] [2022-11-18 20:45:23,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:45:23,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:45:23,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:23,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:45:23,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:45:23,762 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) [2022-11-18 20:45:23,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:23,777 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-18 20:45:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:45:23,778 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 [2022-11-18 20:45:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:23,779 INFO L225 Difference]: With dead ends: 40 [2022-11-18 20:45:23,779 INFO L226 Difference]: Without dead ends: 28 [2022-11-18 20:45:23,779 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 [2022-11-18 20:45:23,780 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 [2022-11-18 20:45:23,780 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] [2022-11-18 20:45:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-18 20:45:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-18 20:45:23,785 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) [2022-11-18 20:45:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-11-18 20:45:23,786 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 15 [2022-11-18 20:45:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:23,786 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-11-18 20:45:23,787 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) [2022-11-18 20:45:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-11-18 20:45:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-18 20:45:23,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:23,788 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:23,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:45:23,788 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)] === [2022-11-18 20:45:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:23,789 INFO L85 PathProgramCache]: Analyzing trace with hash 676448303, now seen corresponding path program 1 times [2022-11-18 20:45:23,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:23,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171974708] [2022-11-18 20:45:23,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:23,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171974708] [2022-11-18 20:45:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171974708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123532305] [2022-11-18 20:45:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:24,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:24,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:24,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:24,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:45:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:24,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:45:24,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:24,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:24,387 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 [2022-11-18 20:45:24,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:24,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123532305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:24,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:24,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-18 20:45:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835672109] [2022-11-18 20:45:24,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:45:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:45:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:45:24,421 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) [2022-11-18 20:45:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:24,592 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-18 20:45:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:45:24,593 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 [2022-11-18 20:45:24,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:24,593 INFO L225 Difference]: With dead ends: 37 [2022-11-18 20:45:24,594 INFO L226 Difference]: Without dead ends: 33 [2022-11-18 20:45:24,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:45:24,595 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 195 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:24,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 57 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:45:24,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-18 20:45:24,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2022-11-18 20:45:24,597 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) [2022-11-18 20:45:24,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-11-18 20:45:24,597 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 18 [2022-11-18 20:45:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:24,599 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-11-18 20:45:24,599 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) [2022-11-18 20:45:24,599 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-11-18 20:45:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:45:24,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:24,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:24,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:24,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:45:24,810 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)] === [2022-11-18 20:45:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1434576067, now seen corresponding path program 2 times [2022-11-18 20:45:24,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:24,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674645455] [2022-11-18 20:45:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:24,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:25,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674645455] [2022-11-18 20:45:25,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674645455] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:25,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312665595] [2022-11-18 20:45:25,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:25,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:25,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:25,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:45:25,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:45:25,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:25,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:45:25,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:25,362 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 [2022-11-18 20:45:25,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:25,684 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 [2022-11-18 20:45:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:25,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:26,376 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 [2022-11-18 20:45:26,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:45:26,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:45:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:26,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312665595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:26,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:26,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-11-18 20:45:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844047251] [2022-11-18 20:45:26,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:26,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:45:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:26,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:45:26,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:45:26,432 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) [2022-11-18 20:45:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:26,992 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2022-11-18 20:45:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:45:26,993 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 [2022-11-18 20:45:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:26,993 INFO L225 Difference]: With dead ends: 54 [2022-11-18 20:45:26,993 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 20:45:26,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=180, Invalid=1302, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:45:26,995 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:26,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 153 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-18 20:45:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 20:45:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-11-18 20:45:26,996 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) [2022-11-18 20:45:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-11-18 20:45:26,997 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2022-11-18 20:45:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:26,997 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-11-18 20:45:26,997 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) [2022-11-18 20:45:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-11-18 20:45:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:45:26,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:26,998 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:27,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:27,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:45:27,211 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)] === [2022-11-18 20:45:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:27,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1404730010, now seen corresponding path program 3 times [2022-11-18 20:45:27,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:27,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206536998] [2022-11-18 20:45:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:27,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:27,706 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:27,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206536998] [2022-11-18 20:45:27,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206536998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:27,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079227143] [2022-11-18 20:45:27,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:45:27,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:27,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:27,709 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:27,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:45:27,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:45:27,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-18 20:45:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:27,924 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 [2022-11-18 20:45:28,172 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:28,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:28,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 20:45:28,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:45:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:28,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079227143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:28,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:28,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-18 20:45:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139528851] [2022-11-18 20:45:28,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:45:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:45:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:45:28,410 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) [2022-11-18 20:45:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:28,765 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2022-11-18 20:45:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:45:28,765 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 [2022-11-18 20:45:28,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:28,766 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:45:28,766 INFO L226 Difference]: Without dead ends: 42 [2022-11-18 20:45:28,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:45:28,767 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:28,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 147 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 227 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-11-18 20:45:28,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-18 20:45:28,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2022-11-18 20:45:28,769 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) [2022-11-18 20:45:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-11-18 20:45:28,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 34 [2022-11-18 20:45:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:28,770 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-11-18 20:45:28,770 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) [2022-11-18 20:45:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-11-18 20:45:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:45:28,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:28,770 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:28,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:28,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:45:28,977 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)] === [2022-11-18 20:45:28,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:28,977 INFO L85 PathProgramCache]: Analyzing trace with hash 746707293, now seen corresponding path program 4 times [2022-11-18 20:45:28,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:28,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790863398] [2022-11-18 20:45:28,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:28,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:29,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790863398] [2022-11-18 20:45:29,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790863398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:29,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373115561] [2022-11-18 20:45:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:29,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:29,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:45:29,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:45:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:29,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:29,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:30,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373115561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:30,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:30,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-18 20:45:30,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282326613] [2022-11-18 20:45:30,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:30,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-18 20:45:30,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:30,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-18 20:45:30,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:45:30,063 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) [2022-11-18 20:45:30,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:30,423 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2022-11-18 20:45:30,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:45:30,424 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 [2022-11-18 20:45:30,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:30,425 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:45:30,425 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:45:30,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:45:30,426 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 197 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:30,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 169 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:45:30,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:45:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-11-18 20:45:30,428 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) [2022-11-18 20:45:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-18 20:45:30,429 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2022-11-18 20:45:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:30,431 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-18 20:45:30,431 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) [2022-11-18 20:45:30,431 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-18 20:45:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-18 20:45:30,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:30,435 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:30,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:30,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:45:30,646 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)] === [2022-11-18 20:45:30,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:30,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1090509681, now seen corresponding path program 5 times [2022-11-18 20:45:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:30,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212406486] [2022-11-18 20:45:30,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:30,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212406486] [2022-11-18 20:45:31,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212406486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:31,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587019279] [2022-11-18 20:45:31,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:45:31,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:31,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:31,331 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:31,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:45:31,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:45:31,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:31,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:45:31,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:31,596 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 [2022-11-18 20:45:31,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:45:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:31,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:31,892 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 [2022-11-18 20:45:31,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:45:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:32,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587019279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:32,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:32,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2022-11-18 20:45:32,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456580385] [2022-11-18 20:45:32,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:45:32,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:32,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:45:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:45:32,045 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) [2022-11-18 20:45:32,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:32,530 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2022-11-18 20:45:32,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:45:32,531 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 [2022-11-18 20:45:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:32,532 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:45:32,532 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 20:45:32,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2022-11-18 20:45:32,533 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:32,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 210 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:45:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 20:45:32,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2022-11-18 20:45:32,535 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) [2022-11-18 20:45:32,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-18 20:45:32,535 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-11-18 20:45:32,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:32,535 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-18 20:45:32,535 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) [2022-11-18 20:45:32,536 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-18 20:45:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:45:32,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:32,536 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:32,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:32,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:45:32,737 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)] === [2022-11-18 20:45:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:32,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1893589620, now seen corresponding path program 6 times [2022-11-18 20:45:32,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:32,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971826918] [2022-11-18 20:45:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:32,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:32,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:33,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971826918] [2022-11-18 20:45:33,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971826918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:33,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278335285] [2022-11-18 20:45:33,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:45:33,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:33,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:33,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:33,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:45:33,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:45:33,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:33,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-18 20:45:33,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:33,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:33,957 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 [2022-11-18 20:45:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:34,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278335285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:34,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:34,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-11-18 20:45:34,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205744683] [2022-11-18 20:45:34,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:34,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:45:34,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:45:34,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:45:34,055 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) [2022-11-18 20:45:34,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:34,445 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2022-11-18 20:45:34,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:45:34,446 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 [2022-11-18 20:45:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:34,446 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:45:34,446 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:45:34,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:45:34,447 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 381 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:34,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 169 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:45:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:45:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-11-18 20:45:34,449 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) [2022-11-18 20:45:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-11-18 20:45:34,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2022-11-18 20:45:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:34,450 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-11-18 20:45:34,450 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) [2022-11-18 20:45:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-11-18 20:45:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-18 20:45:34,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:34,451 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:34,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:34,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:34,651 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)] === [2022-11-18 20:45:34,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:34,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1457490104, now seen corresponding path program 7 times [2022-11-18 20:45:34,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592189958] [2022-11-18 20:45:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:34,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:35,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592189958] [2022-11-18 20:45:35,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592189958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:35,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125290461] [2022-11-18 20:45:35,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:45:35,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:35,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:35,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:35,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:45:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:35,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:45:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:35,758 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 [2022-11-18 20:45:36,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:45:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:36,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:36,351 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 [2022-11-18 20:45:36,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:45:36,913 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:36,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125290461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:36,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:36,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 40 [2022-11-18 20:45:36,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836124766] [2022-11-18 20:45:36,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:36,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:45:36,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:36,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:45:36,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1437, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:45:36,916 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) [2022-11-18 20:45:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:37,705 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2022-11-18 20:45:37,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:45:37,705 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 [2022-11-18 20:45:37,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:37,706 INFO L225 Difference]: With dead ends: 91 [2022-11-18 20:45:37,706 INFO L226 Difference]: Without dead ends: 62 [2022-11-18 20:45:37,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=2462, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:45:37,708 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 205 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:37,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 422 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 605 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2022-11-18 20:45:37,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-18 20:45:37,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-11-18 20:45:37,709 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) [2022-11-18 20:45:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2022-11-18 20:45:37,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 54 [2022-11-18 20:45:37,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:37,710 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2022-11-18 20:45:37,711 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) [2022-11-18 20:45:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2022-11-18 20:45:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 20:45:37,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:37,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:37,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:37,912 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)] === [2022-11-18 20:45:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash 454022795, now seen corresponding path program 8 times [2022-11-18 20:45:37,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:37,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782976560] [2022-11-18 20:45:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:37,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:38,469 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:38,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782976560] [2022-11-18 20:45:38,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782976560] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:38,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750212183] [2022-11-18 20:45:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:38,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:38,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:38,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:38,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:45:38,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:45:38,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-18 20:45:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:38,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:39,239 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 5 treesize of output 3 [2022-11-18 20:45:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:39,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750212183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:39,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:39,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-11-18 20:45:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908640676] [2022-11-18 20:45:39,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:39,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-18 20:45:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-18 20:45:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:45:39,360 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) [2022-11-18 20:45:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:39,840 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2022-11-18 20:45:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:45:39,841 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 [2022-11-18 20:45:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:39,841 INFO L225 Difference]: With dead ends: 70 [2022-11-18 20:45:39,841 INFO L226 Difference]: Without dead ends: 70 [2022-11-18 20:45:39,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:45:39,843 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 367 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:39,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 298 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:45:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-18 20:45:39,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-18 20:45:39,845 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) [2022-11-18 20:45:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2022-11-18 20:45:39,845 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 58 [2022-11-18 20:45:39,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:39,845 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2022-11-18 20:45:39,846 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) [2022-11-18 20:45:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2022-11-18 20:45:39,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:45:39,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:39,847 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:39,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:40,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:40,047 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)] === [2022-11-18 20:45:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1538965023, now seen corresponding path program 9 times [2022-11-18 20:45:40,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:40,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195974402] [2022-11-18 20:45:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:40,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195974402] [2022-11-18 20:45:40,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195974402] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:40,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052911455] [2022-11-18 20:45:40,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:45:40,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:40,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:40,840 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:40,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:45:41,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 20:45:41,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 20:45:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:41,345 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 [2022-11-18 20:45:41,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:45:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:41,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:41,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 20:45:41,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:45:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:41,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052911455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:41,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:41,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-11-18 20:45:41,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939775850] [2022-11-18 20:45:41,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:41,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:45:41,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:41,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:45:41,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:45:41,917 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) [2022-11-18 20:45:42,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:42,919 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2022-11-18 20:45:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:45:42,922 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 [2022-11-18 20:45:42,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:42,923 INFO L225 Difference]: With dead ends: 107 [2022-11-18 20:45:42,923 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 20:45:42,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=263, Invalid=1993, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:45:42,925 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 190 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:42,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 488 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 752 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-18 20:45:42,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 20:45:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-18 20:45:42,927 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) [2022-11-18 20:45:42,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-11-18 20:45:42,927 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 64 [2022-11-18 20:45:42,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:42,928 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-11-18 20:45:42,928 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) [2022-11-18 20:45:42,928 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-11-18 20:45:42,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-18 20:45:42,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:42,929 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:42,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:45:43,135 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)] === [2022-11-18 20:45:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1159341474, now seen corresponding path program 10 times [2022-11-18 20:45:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:43,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600355776] [2022-11-18 20:45:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600355776] [2022-11-18 20:45:43,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600355776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561833278] [2022-11-18 20:45:43,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:43,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:43,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:43,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:43,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:45:44,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:44,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:44,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:45:44,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:44,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:44,458 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:44,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:45,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561833278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:45,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:45,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-11-18 20:45:45,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290416520] [2022-11-18 20:45:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:45,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:45:45,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:45,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:45:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:45:45,221 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) [2022-11-18 20:45:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:45,908 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2022-11-18 20:45:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:45:45,909 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 [2022-11-18 20:45:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:45,910 INFO L225 Difference]: With dead ends: 80 [2022-11-18 20:45:45,910 INFO L226 Difference]: Without dead ends: 80 [2022-11-18 20:45:45,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:45:45,911 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 512 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:45,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 337 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:45:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-18 20:45:45,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-11-18 20:45:45,913 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) [2022-11-18 20:45:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-11-18 20:45:45,914 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 68 [2022-11-18 20:45:45,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:45,914 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-11-18 20:45:45,914 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) [2022-11-18 20:45:45,914 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-11-18 20:45:45,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:45:45,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:45,915 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:45,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:46,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-18 20:45:46,136 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)] === [2022-11-18 20:45:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:46,137 INFO L85 PathProgramCache]: Analyzing trace with hash 591208438, now seen corresponding path program 11 times [2022-11-18 20:45:46,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:46,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825632491] [2022-11-18 20:45:46,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:45:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:46,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825632491] [2022-11-18 20:45:46,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825632491] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231948799] [2022-11-18 20:45:46,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:45:46,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:46,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:47,000 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:47,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:45:47,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:45:47,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:47,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-18 20:45:47,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:47,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:45:47,361 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 [2022-11-18 20:45:48,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:45:48,550 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 [2022-11-18 20:45:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:48,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:50,140 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 [2022-11-18 20:45:50,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:45:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 45 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:45:50,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231948799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:50,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:45:50,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2022-11-18 20:45:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523562177] [2022-11-18 20:45:50,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-18 20:45:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:50,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-18 20:45:50,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 20:45:50,731 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) [2022-11-18 20:46:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:08,473 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2022-11-18 20:46:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-18 20:46:08,474 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 [2022-11-18 20:46:08,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:08,474 INFO L225 Difference]: With dead ends: 129 [2022-11-18 20:46:08,475 INFO L226 Difference]: Without dead ends: 88 [2022-11-18 20:46:08,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 135 SyntacticMatches, 19 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=631, Invalid=6341, Unknown=0, NotChecked=0, Total=6972 [2022-11-18 20:46:08,478 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:08,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 553 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 585 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2022-11-18 20:46:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-18 20:46:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 85. [2022-11-18 20:46:08,480 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) [2022-11-18 20:46:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-11-18 20:46:08,480 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 74 [2022-11-18 20:46:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:08,481 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-11-18 20:46:08,481 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) [2022-11-18 20:46:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-11-18 20:46:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 20:46:08,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:08,482 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:08,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:08,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:46:08,682 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)] === [2022-11-18 20:46:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:08,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2078674125, now seen corresponding path program 12 times [2022-11-18 20:46:08,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:08,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042008650] [2022-11-18 20:46:08,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:08,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:09,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042008650] [2022-11-18 20:46:09,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042008650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:09,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918102560] [2022-11-18 20:46:09,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:46:09,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:09,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:09,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:09,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:46:09,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 20:46:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:09,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-18 20:46:09,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:10,278 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 [2022-11-18 20:46:10,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:46:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:10,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:10,792 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 [2022-11-18 20:46:10,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:46:11,069 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:11,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918102560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:11,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:11,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2022-11-18 20:46:11,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611490419] [2022-11-18 20:46:11,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:11,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:46:11,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:11,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:46:11,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:46:11,071 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) [2022-11-18 20:46:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:12,502 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2022-11-18 20:46:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:46:12,505 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 [2022-11-18 20:46:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:12,505 INFO L225 Difference]: With dead ends: 139 [2022-11-18 20:46:12,505 INFO L226 Difference]: Without dead ends: 92 [2022-11-18 20:46:12,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=315, Invalid=2991, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 20:46:12,507 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 305 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:12,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 723 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1206 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:46:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-18 20:46:12,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2022-11-18 20:46:12,509 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) [2022-11-18 20:46:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2022-11-18 20:46:12,509 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 84 [2022-11-18 20:46:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:12,509 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2022-11-18 20:46:12,510 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) [2022-11-18 20:46:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2022-11-18 20:46:12,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-18 20:46:12,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:12,510 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:12,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:12,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:12,712 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)] === [2022-11-18 20:46:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:12,714 INFO L85 PathProgramCache]: Analyzing trace with hash -53373744, now seen corresponding path program 13 times [2022-11-18 20:46:12,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:12,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987515974] [2022-11-18 20:46:12,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:12,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 66 proven. 230 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:13,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987515974] [2022-11-18 20:46:13,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987515974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:13,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047541348] [2022-11-18 20:46:13,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:46:13,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:13,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:13,692 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:13,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:46:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:46:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:14,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:15,059 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 [2022-11-18 20:46:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 91 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:15,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047541348] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:15,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:15,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 43 [2022-11-18 20:46:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771076989] [2022-11-18 20:46:15,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:15,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 20:46:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:15,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 20:46:15,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:46:15,339 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) [2022-11-18 20:46:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:16,380 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2022-11-18 20:46:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:46:16,381 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 [2022-11-18 20:46:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:16,381 INFO L225 Difference]: With dead ends: 100 [2022-11-18 20:46:16,382 INFO L226 Difference]: Without dead ends: 100 [2022-11-18 20:46:16,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2022-11-18 20:46:16,383 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 313 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:16,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 556 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:46:16,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-18 20:46:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-11-18 20:46:16,386 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) [2022-11-18 20:46:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2022-11-18 20:46:16,386 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 88 [2022-11-18 20:46:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:16,387 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2022-11-18 20:46:16,387 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) [2022-11-18 20:46:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2022-11-18 20:46:16,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-18 20:46:16,388 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:16,388 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:16,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 20:46:16,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:46:16,594 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)] === [2022-11-18 20:46:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1254356132, now seen corresponding path program 14 times [2022-11-18 20:46:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942288836] [2022-11-18 20:46:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:17,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942288836] [2022-11-18 20:46:17,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942288836] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:17,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622056212] [2022-11-18 20:46:17,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:46:17,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:17,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:17,775 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:17,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:46:17,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:46:17,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-18 20:46:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:18,257 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 [2022-11-18 20:46:19,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:19,992 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 [2022-11-18 20:46:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:20,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:22,003 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 [2022-11-18 20:46:22,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:46:22,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:46:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 91 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:22,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622056212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:22,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:22,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 64 [2022-11-18 20:46:22,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384961388] [2022-11-18 20:46:22,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:22,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 20:46:22,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 20:46:22,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=3728, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:46:22,351 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) [2022-11-18 20:46:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:24,313 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2022-11-18 20:46:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:46:24,314 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 [2022-11-18 20:46:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:24,315 INFO L225 Difference]: With dead ends: 166 [2022-11-18 20:46:24,315 INFO L226 Difference]: Without dead ends: 113 [2022-11-18 20:46:24,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 161 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=521, Invalid=5959, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:46:24,318 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 254 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:24,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1121 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 970 Invalid, 0 Unknown, 252 Unchecked, 0.6s Time] [2022-11-18 20:46:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-18 20:46:24,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 105. [2022-11-18 20:46:24,320 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) [2022-11-18 20:46:24,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-11-18 20:46:24,321 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2022-11-18 20:46:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:24,321 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-11-18 20:46:24,321 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) [2022-11-18 20:46:24,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-11-18 20:46:24,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-18 20:46:24,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:24,322 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:24,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:46:24,523 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)] === [2022-11-18 20:46:24,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:24,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1800059013, now seen corresponding path program 15 times [2022-11-18 20:46:24,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:24,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610258308] [2022-11-18 20:46:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610258308] [2022-11-18 20:46:25,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610258308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087564040] [2022-11-18 20:46:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:46:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:25,851 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:25,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:46:26,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-18 20:46:26,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 20:46:26,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:26,686 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 [2022-11-18 20:46:27,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:46:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:27,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:27,259 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 [2022-11-18 20:46:27,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:46:27,531 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:27,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087564040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:27,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:27,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2022-11-18 20:46:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075782354] [2022-11-18 20:46:27,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:27,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:46:27,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:46:27,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1859, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:46:27,533 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) [2022-11-18 20:46:29,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:29,385 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2022-11-18 20:46:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-18 20:46:29,385 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 [2022-11-18 20:46:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:29,386 INFO L225 Difference]: With dead ends: 171 [2022-11-18 20:46:29,386 INFO L226 Difference]: Without dead ends: 112 [2022-11-18 20:46:29,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=367, Invalid=4189, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:46:29,388 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 448 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 1610 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:29,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1029 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1610 Invalid, 0 Unknown, 50 Unchecked, 0.9s Time] [2022-11-18 20:46:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-18 20:46:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-18 20:46:29,391 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) [2022-11-18 20:46:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-11-18 20:46:29,391 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-11-18 20:46:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:29,392 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-11-18 20:46:29,392 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) [2022-11-18 20:46:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-11-18 20:46:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-18 20:46:29,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:29,393 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:29,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:29,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:46:29,600 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)] === [2022-11-18 20:46:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash -631787522, now seen corresponding path program 16 times [2022-11-18 20:46:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:29,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391704364] [2022-11-18 20:46:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:29,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:30,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:30,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391704364] [2022-11-18 20:46:30,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391704364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:30,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750037742] [2022-11-18 20:46:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:46:30,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:30,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:30,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:46:31,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:46:31,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 20:46:31,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:31,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:46:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750037742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:33,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:33,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 62 [2022-11-18 20:46:33,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132466500] [2022-11-18 20:46:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:33,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-18 20:46:33,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-18 20:46:33,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:46:33,308 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) [2022-11-18 20:46:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:34,674 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2022-11-18 20:46:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:46:34,675 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 [2022-11-18 20:46:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:34,676 INFO L225 Difference]: With dead ends: 120 [2022-11-18 20:46:34,676 INFO L226 Difference]: Without dead ends: 120 [2022-11-18 20:46:34,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1137, Invalid=4715, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 20:46:34,678 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 376 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:34,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 829 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1385 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:46:34,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-18 20:46:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-11-18 20:46:34,680 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) [2022-11-18 20:46:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-11-18 20:46:34,681 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 108 [2022-11-18 20:46:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:34,681 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-11-18 20:46:34,682 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) [2022-11-18 20:46:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-11-18 20:46:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-18 20:46:34,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:34,683 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:34,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:34,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:46:34,890 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)] === [2022-11-18 20:46:34,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 896038226, now seen corresponding path program 17 times [2022-11-18 20:46:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:34,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165868634] [2022-11-18 20:46:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:36,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:36,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165868634] [2022-11-18 20:46:36,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165868634] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:36,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389819994] [2022-11-18 20:46:36,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:46:36,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:36,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:36,320 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:36,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:46:36,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:46:36,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:36,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:46:36,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:36,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:46:37,159 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 [2022-11-18 20:46:38,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:38,880 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 [2022-11-18 20:46:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:40,927 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 [2022-11-18 20:46:40,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:46:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:42,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389819994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:42,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:42,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 83 [2022-11-18 20:46:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469571042] [2022-11-18 20:46:42,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 20:46:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 20:46:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=6243, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 20:46:42,973 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) [2022-11-18 20:46:45,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:45,326 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2022-11-18 20:46:45,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:46:45,327 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 [2022-11-18 20:46:45,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:45,328 INFO L225 Difference]: With dead ends: 198 [2022-11-18 20:46:45,328 INFO L226 Difference]: Without dead ends: 133 [2022-11-18 20:46:45,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=906, Invalid=9600, Unknown=0, NotChecked=0, Total=10506 [2022-11-18 20:46:45,330 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 311 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:45,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 1451 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1380 Invalid, 0 Unknown, 172 Unchecked, 0.8s Time] [2022-11-18 20:46:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-18 20:46:45,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 125. [2022-11-18 20:46:45,333 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) [2022-11-18 20:46:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-11-18 20:46:45,333 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 114 [2022-11-18 20:46:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:45,334 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-11-18 20:46:45,334 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) [2022-11-18 20:46:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-11-18 20:46:45,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-18 20:46:45,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:45,336 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:45,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:45,543 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)] === [2022-11-18 20:46:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1772360151, now seen corresponding path program 18 times [2022-11-18 20:46:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439778717] [2022-11-18 20:46:45,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:45,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:47,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439778717] [2022-11-18 20:46:47,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439778717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:47,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511827048] [2022-11-18 20:46:47,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:46:47,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:47,147 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:47,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:46:47,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-18 20:46:47,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:47,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-18 20:46:47,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:48,075 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 [2022-11-18 20:46:48,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:46:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:48,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:48,680 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 [2022-11-18 20:46:48,683 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 [2022-11-18 20:46:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 45 proven. 594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:48,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511827048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:48,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:48,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2022-11-18 20:46:48,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984430666] [2022-11-18 20:46:48,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:48,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 20:46:48,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:48,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 20:46:48,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2415, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:46:48,960 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) [2022-11-18 20:46:51,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:51,266 INFO L93 Difference]: Finished difference Result 203 states and 204 transitions. [2022-11-18 20:46:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:46:51,266 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 [2022-11-18 20:46:51,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:51,267 INFO L225 Difference]: With dead ends: 203 [2022-11-18 20:46:51,267 INFO L226 Difference]: Without dead ends: 132 [2022-11-18 20:46:51,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 225 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=419, Invalid=5587, Unknown=0, NotChecked=0, Total=6006 [2022-11-18 20:46:51,269 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 386 mSDsluCounter, 1418 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:51,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1467 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2363 Invalid, 0 Unknown, 41 Unchecked, 1.1s Time] [2022-11-18 20:46:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-18 20:46:51,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2022-11-18 20:46:51,272 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) [2022-11-18 20:46:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-11-18 20:46:51,272 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 124 [2022-11-18 20:46:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:51,273 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-11-18 20:46:51,273 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) [2022-11-18 20:46:51,273 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-11-18 20:46:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-18 20:46:51,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:51,275 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:51,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-18 20:46:51,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 20:46:51,481 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)] === [2022-11-18 20:46:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1291843372, now seen corresponding path program 19 times [2022-11-18 20:46:51,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:51,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235064740] [2022-11-18 20:46:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:51,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:52,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235064740] [2022-11-18 20:46:52,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235064740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:52,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407639137] [2022-11-18 20:46:52,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:46:52,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:52,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:52,854 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:52,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:46:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:53,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-18 20:46:53,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:53,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:54,620 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 [2022-11-18 20:46:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407639137] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:55,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:55,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2022-11-18 20:46:55,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624480662] [2022-11-18 20:46:55,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:55,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 20:46:55,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 20:46:55,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 20:46:55,019 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) [2022-11-18 20:46:56,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:56,298 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2022-11-18 20:46:56,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:46:56,299 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 [2022-11-18 20:46:56,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:56,300 INFO L225 Difference]: With dead ends: 140 [2022-11-18 20:46:56,300 INFO L226 Difference]: Without dead ends: 140 [2022-11-18 20:46:56,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 211 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1059, Invalid=4641, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:46:56,301 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 787 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:56,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 882 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:46:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-11-18 20:46:56,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-11-18 20:46:56,305 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) [2022-11-18 20:46:56,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-11-18 20:46:56,305 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 128 [2022-11-18 20:46:56,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:56,306 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-11-18 20:46:56,306 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) [2022-11-18 20:46:56,306 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-11-18 20:46:56,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 20:46:56,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:56,308 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:56,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:56,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-18 20:46:56,511 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)] === [2022-11-18 20:46:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1709056512, now seen corresponding path program 20 times [2022-11-18 20:46:56,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882169894] [2022-11-18 20:46:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:56,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:58,135 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:58,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882169894] [2022-11-18 20:46:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882169894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727614975] [2022-11-18 20:46:58,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:46:58,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:58,137 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:58,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:46:58,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:46:58,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:58,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-18 20:46:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:58,812 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 [2022-11-18 20:47:01,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:01,274 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 [2022-11-18 20:47:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:01,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:04,055 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 [2022-11-18 20:47:04,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:47:04,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:47:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727614975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:04,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:04,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 84 [2022-11-18 20:47:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559925357] [2022-11-18 20:47:04,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:04,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-18 20:47:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-18 20:47:04,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2022-11-18 20:47:04,654 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) [2022-11-18 20:47:07,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:07,738 INFO L93 Difference]: Finished difference Result 230 states and 231 transitions. [2022-11-18 20:47:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-18 20:47:07,739 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 [2022-11-18 20:47:07,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:07,740 INFO L225 Difference]: With dead ends: 230 [2022-11-18 20:47:07,740 INFO L226 Difference]: Without dead ends: 153 [2022-11-18 20:47:07,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 16 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=822, Invalid=10308, Unknown=0, NotChecked=0, Total=11130 [2022-11-18 20:47:07,742 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 335 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1930 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:07,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1930 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1662 Invalid, 0 Unknown, 322 Unchecked, 0.9s Time] [2022-11-18 20:47:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-11-18 20:47:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 145. [2022-11-18 20:47:07,745 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) [2022-11-18 20:47:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-11-18 20:47:07,746 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 134 [2022-11-18 20:47:07,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:07,746 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-11-18 20:47:07,746 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) [2022-11-18 20:47:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-11-18 20:47:07,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-18 20:47:07,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:07,748 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:07,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:07,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:07,955 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)] === [2022-11-18 20:47:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1309507799, now seen corresponding path program 21 times [2022-11-18 20:47:07,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:07,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359730712] [2022-11-18 20:47:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:07,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:09,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359730712] [2022-11-18 20:47:09,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359730712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:09,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886763615] [2022-11-18 20:47:09,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:47:09,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:09,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:09,747 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:47:10,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-18 20:47:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:10,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-18 20:47:10,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:10,950 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 [2022-11-18 20:47:11,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:47:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:11,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:11,555 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 [2022-11-18 20:47:11,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:47:11,844 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 53 proven. 832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:11,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886763615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:11,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:11,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2022-11-18 20:47:11,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070709269] [2022-11-18 20:47:11,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:11,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:47:11,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:11,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:47:11,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3043, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:47:11,847 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) [2022-11-18 20:47:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:14,763 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2022-11-18 20:47:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 20:47:14,764 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 [2022-11-18 20:47:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:14,765 INFO L225 Difference]: With dead ends: 235 [2022-11-18 20:47:14,765 INFO L226 Difference]: Without dead ends: 152 [2022-11-18 20:47:14,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 263 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=426, Invalid=7406, Unknown=0, NotChecked=0, Total=7832 [2022-11-18 20:47:14,772 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 219 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 3063 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 2016 SdHoareTripleChecker+Invalid, 3207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:14,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 2016 Invalid, 3207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3063 Invalid, 0 Unknown, 129 Unchecked, 1.4s Time] [2022-11-18 20:47:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-18 20:47:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 149. [2022-11-18 20:47:14,788 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) [2022-11-18 20:47:14,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-11-18 20:47:14,790 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 144 [2022-11-18 20:47:14,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:14,794 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-11-18 20:47:14,794 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) [2022-11-18 20:47:14,794 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-11-18 20:47:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-18 20:47:14,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:14,799 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:14,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:15,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:15,003 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)] === [2022-11-18 20:47:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:15,003 INFO L85 PathProgramCache]: Analyzing trace with hash -786568614, now seen corresponding path program 22 times [2022-11-18 20:47:15,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:15,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52363226] [2022-11-18 20:47:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:15,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52363226] [2022-11-18 20:47:16,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52363226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:16,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705597384] [2022-11-18 20:47:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:47:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:16,472 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:16,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:47:16,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:47:16,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:16,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:47:16,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:47:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:17,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:19,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705597384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:19,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:19,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 82 [2022-11-18 20:47:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350293273] [2022-11-18 20:47:19,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-18 20:47:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-18 20:47:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=887, Invalid=5919, Unknown=0, NotChecked=0, Total=6806 [2022-11-18 20:47:19,692 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) [2022-11-18 20:47:21,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:21,420 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2022-11-18 20:47:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:47:21,420 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 [2022-11-18 20:47:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:21,422 INFO L225 Difference]: With dead ends: 160 [2022-11-18 20:47:21,422 INFO L226 Difference]: Without dead ends: 160 [2022-11-18 20:47:21,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2740 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1953, Invalid=8147, Unknown=0, NotChecked=0, Total=10100 [2022-11-18 20:47:21,423 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1095 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1360 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:21,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 1360 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-18 20:47:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-18 20:47:21,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2022-11-18 20:47:21,427 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) [2022-11-18 20:47:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-11-18 20:47:21,428 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 148 [2022-11-18 20:47:21,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:21,428 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-11-18 20:47:21,429 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) [2022-11-18 20:47:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-11-18 20:47:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-18 20:47:21,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:21,431 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:21,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:21,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:47:21,638 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)] === [2022-11-18 20:47:21,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:21,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1411876178, now seen corresponding path program 23 times [2022-11-18 20:47:21,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:21,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329486363] [2022-11-18 20:47:21,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:21,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 57 proven. 966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:23,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:23,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329486363] [2022-11-18 20:47:23,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329486363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:23,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543341663] [2022-11-18 20:47:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:47:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:23,578 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:23,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:47:23,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-18 20:47:23,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:23,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-18 20:47:23,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:23,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:47:24,796 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 [2022-11-18 20:47:29,229 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:29,229 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 [2022-11-18 20:47:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 697 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:29,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:32,048 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 [2022-11-18 20:47:32,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:47:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 325 proven. 698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:35,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543341663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:35,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:35,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2022-11-18 20:47:35,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621952443] [2022-11-18 20:47:35,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:35,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-18 20:47:35,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:35,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-18 20:47:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=10414, Unknown=1, NotChecked=0, Total=11342 [2022-11-18 20:47:35,527 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) [2022-11-18 20:47:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:39,536 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2022-11-18 20:47:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:47:39,536 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 [2022-11-18 20:47:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:39,538 INFO L225 Difference]: With dead ends: 262 [2022-11-18 20:47:39,538 INFO L226 Difference]: Without dead ends: 173 [2022-11-18 20:47:39,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1404, Invalid=15625, Unknown=1, NotChecked=0, Total=17030 [2022-11-18 20:47:39,540 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 363 mSDsluCounter, 2511 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 2576 SdHoareTripleChecker+Invalid, 2742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 459 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:39,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 2576 Invalid, 2742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2265 Invalid, 0 Unknown, 459 Unchecked, 1.4s Time] [2022-11-18 20:47:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-18 20:47:39,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 165. [2022-11-18 20:47:39,544 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) [2022-11-18 20:47:39,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-11-18 20:47:39,545 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 154 [2022-11-18 20:47:39,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:39,545 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-11-18 20:47:39,546 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) [2022-11-18 20:47:39,546 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-11-18 20:47:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-18 20:47:39,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:39,548 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:39,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:39,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:47:39,756 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)] === [2022-11-18 20:47:39,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1174241157, now seen corresponding path program 24 times [2022-11-18 20:47:39,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:39,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873901801] [2022-11-18 20:47:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:39,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:42,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873901801] [2022-11-18 20:47:42,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873901801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:42,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375871148] [2022-11-18 20:47:42,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:47:42,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:42,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:42,012 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:42,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:47:42,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-18 20:47:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-18 20:47:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:43,647 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 [2022-11-18 20:47:44,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:47:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:44,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:44,363 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 [2022-11-18 20:47:44,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:47:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 61 proven. 1110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:44,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375871148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:44,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:44,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 63 [2022-11-18 20:47:44,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949055214] [2022-11-18 20:47:44,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:44,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-18 20:47:44,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:44,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-18 20:47:44,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3743, Unknown=0, NotChecked=0, Total=3906 [2022-11-18 20:47:44,712 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) [2022-11-18 20:47:49,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:49,306 INFO L93 Difference]: Finished difference Result 267 states and 268 transitions. [2022-11-18 20:47:49,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:47:49,306 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 [2022-11-18 20:47:49,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:49,307 INFO L225 Difference]: With dead ends: 267 [2022-11-18 20:47:49,307 INFO L226 Difference]: Without dead ends: 172 [2022-11-18 20:47:49,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 301 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=523, Invalid=8983, Unknown=0, NotChecked=0, Total=9506 [2022-11-18 20:47:49,309 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 610 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 4573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:49,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 2858 Invalid, 4573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 4555 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-18 20:47:49,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-18 20:47:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 169. [2022-11-18 20:47:49,313 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) [2022-11-18 20:47:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-11-18 20:47:49,314 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-11-18 20:47:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:49,314 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-11-18 20:47:49,314 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) [2022-11-18 20:47:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-11-18 20:47:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-18 20:47:49,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:49,316 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:49,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:49,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-18 20:47:49,524 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)] === [2022-11-18 20:47:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:49,525 INFO L85 PathProgramCache]: Analyzing trace with hash -804976248, now seen corresponding path program 25 times [2022-11-18 20:47:49,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:49,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028527639] [2022-11-18 20:47:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:49,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 378 proven. 854 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028527639] [2022-11-18 20:47:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028527639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938284544] [2022-11-18 20:47:51,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:47:51,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:51,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:51,163 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:51,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:47:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:51,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-18 20:47:51,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:47:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:52,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:47:53,833 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 [2022-11-18 20:47:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 435 proven. 797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:54,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938284544] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:54,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:54,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2022-11-18 20:47:54,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306897475] [2022-11-18 20:47:54,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:54,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-18 20:47:54,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-18 20:47:54,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2022-11-18 20:47:54,446 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) [2022-11-18 20:47:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:47:56,633 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2022-11-18 20:47:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:47:56,634 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 [2022-11-18 20:47:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:47:56,635 INFO L225 Difference]: With dead ends: 180 [2022-11-18 20:47:56,635 INFO L226 Difference]: Without dead ends: 180 [2022-11-18 20:47:56,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 279 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1677, Invalid=7443, Unknown=0, NotChecked=0, Total=9120 [2022-11-18 20:47:56,636 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 653 mSDsluCounter, 1511 mSDsCounter, 0 mSdLazyCounter, 2619 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:47:56,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 1582 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2619 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-18 20:47:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-18 20:47:56,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 175. [2022-11-18 20:47:56,640 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) [2022-11-18 20:47:56,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-11-18 20:47:56,641 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 168 [2022-11-18 20:47:56,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:47:56,642 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-11-18 20:47:56,642 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) [2022-11-18 20:47:56,642 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-11-18 20:47:56,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 20:47:56,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:47:56,644 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:47:56,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:47:56,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 20:47:56,850 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)] === [2022-11-18 20:47:56,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:47:56,851 INFO L85 PathProgramCache]: Analyzing trace with hash 67829596, now seen corresponding path program 26 times [2022-11-18 20:47:56,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:47:56,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295925570] [2022-11-18 20:47:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:47:56,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:47:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:47:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 65 proven. 1264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:47:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295925570] [2022-11-18 20:47:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295925570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:47:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954423678] [2022-11-18 20:47:59,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:47:59,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:47:59,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:47:59,181 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:47:59,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:47:59,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:47:59,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:47:59,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 20:47:59,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:00,331 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 [2022-11-18 20:48:04,051 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:48:04,051 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 [2022-11-18 20:48:04,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:04,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:08,183 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 [2022-11-18 20:48:08,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:48:08,197 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 [2022-11-18 20:48:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 435 proven. 894 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:09,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954423678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:09,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:48:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 104 [2022-11-18 20:48:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618454505] [2022-11-18 20:48:09,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:09,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-18 20:48:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-18 20:48:09,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=9988, Unknown=0, NotChecked=0, Total=10712 [2022-11-18 20:48:09,155 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) [2022-11-18 20:48:14,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:14,548 INFO L93 Difference]: Finished difference Result 294 states and 295 transitions. [2022-11-18 20:48:14,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:48:14,549 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 [2022-11-18 20:48:14,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:14,549 INFO L225 Difference]: With dead ends: 294 [2022-11-18 20:48:14,549 INFO L226 Difference]: Without dead ends: 193 [2022-11-18 20:48:14,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 313 SyntacticMatches, 20 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3441 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1174, Invalid=15596, Unknown=0, NotChecked=0, Total=16770 [2022-11-18 20:48:14,552 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 411 mSDsluCounter, 3390 mSDsCounter, 0 mSdLazyCounter, 3025 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 3463 SdHoareTripleChecker+Invalid, 3776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:14,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 3463 Invalid, 3776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3025 Invalid, 0 Unknown, 730 Unchecked, 2.0s Time] [2022-11-18 20:48:14,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-18 20:48:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 185. [2022-11-18 20:48:14,556 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) [2022-11-18 20:48:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2022-11-18 20:48:14,556 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 174 [2022-11-18 20:48:14,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:14,557 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2022-11-18 20:48:14,557 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) [2022-11-18 20:48:14,557 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2022-11-18 20:48:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-11-18 20:48:14,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:14,559 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:14,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:14,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:14,766 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)] === [2022-11-18 20:48:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1520473549, now seen corresponding path program 27 times [2022-11-18 20:48:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:14,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794044530] [2022-11-18 20:48:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:17,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:17,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794044530] [2022-11-18 20:48:17,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794044530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:17,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059446799] [2022-11-18 20:48:17,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:48:17,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:17,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:17,110 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:17,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:48:18,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-18 20:48:18,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 123 conjunts are in the unsatisfiable core [2022-11-18 20:48:18,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:19,151 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 [2022-11-18 20:48:19,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:48:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:19,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:19,961 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 [2022-11-18 20:48:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:48:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 69 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:20,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059446799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:20,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:48:20,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 69 [2022-11-18 20:48:20,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738814686] [2022-11-18 20:48:20,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:20,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:48:20,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:20,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:48:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=4515, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:48:20,321 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) [2022-11-18 20:48:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:25,845 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2022-11-18 20:48:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:48:25,845 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 [2022-11-18 20:48:25,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:25,847 INFO L225 Difference]: With dead ends: 299 [2022-11-18 20:48:25,847 INFO L226 Difference]: Without dead ends: 192 [2022-11-18 20:48:25,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 339 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=575, Invalid=10981, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 20:48:25,848 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 577 mSDsluCounter, 3523 mSDsCounter, 0 mSdLazyCounter, 5713 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 3596 SdHoareTripleChecker+Invalid, 5732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:25,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 3596 Invalid, 5732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5713 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:48:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-18 20:48:25,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2022-11-18 20:48:25,851 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) [2022-11-18 20:48:25,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-11-18 20:48:25,852 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 184 [2022-11-18 20:48:25,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:25,853 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-11-18 20:48:25,853 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) [2022-11-18 20:48:25,853 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-11-18 20:48:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-18 20:48:25,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:25,854 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:25,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:48:26,063 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)] === [2022-11-18 20:48:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:26,064 INFO L85 PathProgramCache]: Analyzing trace with hash -2146904906, now seen corresponding path program 28 times [2022-11-18 20:48:26,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:26,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228527678] [2022-11-18 20:48:26,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:26,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 496 proven. 1070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:28,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228527678] [2022-11-18 20:48:28,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228527678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:28,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171652228] [2022-11-18 20:48:28,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:48:28,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:28,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:28,140 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:28,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:48:28,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:48:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:28,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-18 20:48:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:28,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:48:30,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:30,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 561 proven. 1005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:34,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171652228] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:34,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:48:34,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 100 [2022-11-18 20:48:34,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940944405] [2022-11-18 20:48:34,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:34,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-18 20:48:34,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:34,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-18 20:48:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=8673, Unknown=0, NotChecked=0, Total=10100 [2022-11-18 20:48:34,032 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) [2022-11-18 20:48:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:36,807 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2022-11-18 20:48:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:48:36,807 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 [2022-11-18 20:48:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:36,809 INFO L225 Difference]: With dead ends: 200 [2022-11-18 20:48:36,809 INFO L226 Difference]: Without dead ends: 200 [2022-11-18 20:48:36,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3037, Invalid=11969, Unknown=0, NotChecked=0, Total=15006 [2022-11-18 20:48:36,811 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 849 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:36,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1787 Invalid, 2911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:48:36,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-18 20:48:36,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2022-11-18 20:48:36,814 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) [2022-11-18 20:48:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-11-18 20:48:36,815 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 188 [2022-11-18 20:48:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:36,815 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-11-18 20:48:36,816 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) [2022-11-18 20:48:36,816 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-11-18 20:48:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-18 20:48:36,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:36,817 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:36,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:37,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-18 20:48:37,026 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)] === [2022-11-18 20:48:37,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2015965194, now seen corresponding path program 29 times [2022-11-18 20:48:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:37,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415712226] [2022-11-18 20:48:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 73 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:39,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415712226] [2022-11-18 20:48:39,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415712226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:39,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085032306] [2022-11-18 20:48:39,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:48:39,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:39,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:39,664 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:39,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:48:40,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-18 20:48:40,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-18 20:48:40,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:40,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:48:41,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-18 20:48:48,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:48:48,675 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 [2022-11-18 20:48:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1112 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:49,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:53,160 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 [2022-11-18 20:48:53,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:48:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 561 proven. 1114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:58,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085032306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:58,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:48:58,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 131 [2022-11-18 20:48:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603356749] [2022-11-18 20:48:58,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-11-18 20:48:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-11-18 20:48:58,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=15641, Unknown=2, NotChecked=0, Total=17030 [2022-11-18 20:48:58,248 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) [2022-11-18 20:49:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:04,787 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2022-11-18 20:49:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-18 20:49:04,788 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 [2022-11-18 20:49:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:04,789 INFO L225 Difference]: With dead ends: 326 [2022-11-18 20:49:04,789 INFO L226 Difference]: Without dead ends: 213 [2022-11-18 20:49:04,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4258 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=2014, Invalid=23106, Unknown=2, NotChecked=0, Total=25122 [2022-11-18 20:49:04,792 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 468 mSDsluCounter, 3774 mSDsCounter, 0 mSdLazyCounter, 3295 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 3855 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:04,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 3855 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3295 Invalid, 0 Unknown, 452 Unchecked, 2.1s Time] [2022-11-18 20:49:04,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-18 20:49:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2022-11-18 20:49:04,796 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) [2022-11-18 20:49:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-11-18 20:49:04,797 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 194 [2022-11-18 20:49:04,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:04,798 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-11-18 20:49:04,798 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) [2022-11-18 20:49:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-11-18 20:49:04,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-18 20:49:04,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:04,800 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:04,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:05,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:05,008 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)] === [2022-11-18 20:49:05,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:05,009 INFO L85 PathProgramCache]: Analyzing trace with hash 275169505, now seen corresponding path program 30 times [2022-11-18 20:49:05,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:05,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353258300] [2022-11-18 20:49:05,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:05,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353258300] [2022-11-18 20:49:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353258300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:08,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089472112] [2022-11-18 20:49:08,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:49:08,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:08,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:08,076 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:08,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:49:09,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-11-18 20:49:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:09,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-18 20:49:09,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:11,060 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 [2022-11-18 20:49:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:11,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:12,125 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 [2022-11-18 20:49:12,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:49:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 77 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:12,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089472112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:12,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:12,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 77 [2022-11-18 20:49:12,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982128950] [2022-11-18 20:49:12,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:12,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-18 20:49:12,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-18 20:49:12,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=5653, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 20:49:12,545 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) [2022-11-18 20:49:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:18,693 INFO L93 Difference]: Finished difference Result 331 states and 332 transitions. [2022-11-18 20:49:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-18 20:49:18,694 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 [2022-11-18 20:49:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:18,695 INFO L225 Difference]: With dead ends: 331 [2022-11-18 20:49:18,695 INFO L226 Difference]: Without dead ends: 212 [2022-11-18 20:49:18,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 375 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=638, Invalid=13642, Unknown=0, NotChecked=0, Total=14280 [2022-11-18 20:49:18,696 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 769 mSDsluCounter, 4016 mSDsCounter, 0 mSdLazyCounter, 6581 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 4097 SdHoareTripleChecker+Invalid, 6669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:18,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 4097 Invalid, 6669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6581 Invalid, 0 Unknown, 65 Unchecked, 3.3s Time] [2022-11-18 20:49:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-18 20:49:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 209. [2022-11-18 20:49:18,701 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) [2022-11-18 20:49:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 210 transitions. [2022-11-18 20:49:18,702 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 210 transitions. Word has length 204 [2022-11-18 20:49:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:18,702 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 210 transitions. [2022-11-18 20:49:18,703 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) [2022-11-18 20:49:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 210 transitions. [2022-11-18 20:49:18,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-18 20:49:18,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:18,704 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:18,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:18,913 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)] === [2022-11-18 20:49:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash -998454300, now seen corresponding path program 31 times [2022-11-18 20:49:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097231799] [2022-11-18 20:49:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 630 proven. 1310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:21,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097231799] [2022-11-18 20:49:21,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097231799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:21,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388876040] [2022-11-18 20:49:21,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:49:21,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:21,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:21,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:21,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:49:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-18 20:49:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:23,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:25,077 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 [2022-11-18 20:49:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1940 backedges. 703 proven. 1237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:25,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388876040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:25,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:25,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 45, 45] total 91 [2022-11-18 20:49:25,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476096127] [2022-11-18 20:49:25,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:25,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-18 20:49:25,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-18 20:49:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=7356, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 20:49:25,985 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) [2022-11-18 20:49:29,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:29,007 INFO L93 Difference]: Finished difference Result 220 states and 221 transitions. [2022-11-18 20:49:29,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:49:29,008 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 [2022-11-18 20:49:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:29,009 INFO L225 Difference]: With dead ends: 220 [2022-11-18 20:49:29,010 INFO L226 Difference]: Without dead ends: 220 [2022-11-18 20:49:29,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 347 SyntacticMatches, 21 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2439, Invalid=10901, Unknown=0, NotChecked=0, Total=13340 [2022-11-18 20:49:29,011 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 936 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 3527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:29,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 2213 Invalid, 3527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 20:49:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-18 20:49:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2022-11-18 20:49:29,016 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) [2022-11-18 20:49:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 216 transitions. [2022-11-18 20:49:29,017 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 216 transitions. Word has length 208 [2022-11-18 20:49:29,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:29,018 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 216 transitions. [2022-11-18 20:49:29,018 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) [2022-11-18 20:49:29,018 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 216 transitions. [2022-11-18 20:49:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-11-18 20:49:29,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:29,020 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:29,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-18 20:49:29,227 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)] === [2022-11-18 20:49:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:29,227 INFO L85 PathProgramCache]: Analyzing trace with hash -18445128, now seen corresponding path program 32 times [2022-11-18 20:49:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396752472] [2022-11-18 20:49:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 81 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:32,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:32,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396752472] [2022-11-18 20:49:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396752472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:32,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231525839] [2022-11-18 20:49:32,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:49:32,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:32,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:32,235 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:32,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:49:32,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:49:32,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 124 conjunts are in the unsatisfiable core [2022-11-18 20:49:32,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:33,767 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 [2022-11-18 20:49:38,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:49:38,643 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 [2022-11-18 20:49:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:39,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:43,622 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 [2022-11-18 20:49:43,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:49:43,639 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 [2022-11-18 20:49:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2061 backedges. 703 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:44,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231525839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:44,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:44,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 124 [2022-11-18 20:49:44,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096784338] [2022-11-18 20:49:44,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-18 20:49:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-18 20:49:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1006, Invalid=14246, Unknown=0, NotChecked=0, Total=15252 [2022-11-18 20:49:44,820 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) [2022-11-18 20:49:52,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:49:52,048 INFO L93 Difference]: Finished difference Result 358 states and 359 transitions. [2022-11-18 20:49:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-11-18 20:49:52,049 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 [2022-11-18 20:49:52,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:49:52,050 INFO L225 Difference]: With dead ends: 358 [2022-11-18 20:49:52,050 INFO L226 Difference]: Without dead ends: 233 [2022-11-18 20:49:52,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 389 SyntacticMatches, 24 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4947 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1590, Invalid=21972, Unknown=0, NotChecked=0, Total=23562 [2022-11-18 20:49:52,052 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 482 mSDsluCounter, 4606 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 4695 SdHoareTripleChecker+Invalid, 4379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:49:52,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 4695 Invalid, 4379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3831 Invalid, 0 Unknown, 523 Unchecked, 2.0s Time] [2022-11-18 20:49:52,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-18 20:49:52,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 225. [2022-11-18 20:49:52,057 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) [2022-11-18 20:49:52,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-11-18 20:49:52,058 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 214 [2022-11-18 20:49:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:49:52,058 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-11-18 20:49:52,059 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) [2022-11-18 20:49:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-11-18 20:49:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-18 20:49:52,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:49:52,060 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:49:52,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:49:52,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-18 20:49:52,267 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)] === [2022-11-18 20:49:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:49:52,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2008611953, now seen corresponding path program 33 times [2022-11-18 20:49:52,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:49:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004134741] [2022-11-18 20:49:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:49:52,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:49:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:49:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:55,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:49:55,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004134741] [2022-11-18 20:49:55,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004134741] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:49:55,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483502136] [2022-11-18 20:49:55,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:49:55,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:49:55,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:49:55,263 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:49:55,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:49:56,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-18 20:49:56,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:49:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 147 conjunts are in the unsatisfiable core [2022-11-18 20:49:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:49:58,338 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 [2022-11-18 20:49:58,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:49:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:58,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:49:59,228 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 [2022-11-18 20:49:59,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:49:59,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 85 proven. 2184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:49:59,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483502136] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:49:59,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:49:59,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 81 [2022-11-18 20:49:59,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956564353] [2022-11-18 20:49:59,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:49:59,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:49:59,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:49:59,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:49:59,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6275, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:49:59,649 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) [2022-11-18 20:50:06,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:06,410 INFO L93 Difference]: Finished difference Result 363 states and 364 transitions. [2022-11-18 20:50:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:50:06,410 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 [2022-11-18 20:50:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:06,412 INFO L225 Difference]: With dead ends: 363 [2022-11-18 20:50:06,412 INFO L226 Difference]: Without dead ends: 232 [2022-11-18 20:50:06,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 544 GetRequests, 415 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1715 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=679, Invalid=15577, Unknown=0, NotChecked=0, Total=16256 [2022-11-18 20:50:06,413 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 841 mSDsluCounter, 5173 mSDsCounter, 0 mSdLazyCounter, 8303 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 5262 SdHoareTripleChecker+Invalid, 8327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 8303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:06,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 5262 Invalid, 8327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 8303 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 20:50:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-18 20:50:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-11-18 20:50:06,417 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) [2022-11-18 20:50:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-11-18 20:50:06,418 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-11-18 20:50:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:06,419 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-11-18 20:50:06,419 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) [2022-11-18 20:50:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-11-18 20:50:06,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-11-18 20:50:06,420 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:06,420 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:06,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:06,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:06,621 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)] === [2022-11-18 20:50:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash 229928722, now seen corresponding path program 34 times [2022-11-18 20:50:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:06,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251289751] [2022-11-18 20:50:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:06,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 780 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:09,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:09,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251289751] [2022-11-18 20:50:09,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251289751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:09,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323841818] [2022-11-18 20:50:09,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:50:09,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:09,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:09,544 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:09,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:50:10,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:50:10,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:10,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-18 20:50:10,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:10,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:50:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:12,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2354 backedges. 861 proven. 1493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:16,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323841818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:16,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:16,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 120 [2022-11-18 20:50:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876607437] [2022-11-18 20:50:16,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:16,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-11-18 20:50:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-11-18 20:50:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2045, Invalid=12475, Unknown=0, NotChecked=0, Total=14520 [2022-11-18 20:50:16,993 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) [2022-11-18 20:50:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:20,976 INFO L93 Difference]: Finished difference Result 240 states and 241 transitions. [2022-11-18 20:50:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:50:20,976 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 [2022-11-18 20:50:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:20,978 INFO L225 Difference]: With dead ends: 240 [2022-11-18 20:50:20,978 INFO L226 Difference]: Without dead ends: 240 [2022-11-18 20:50:20,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5958 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=4313, Invalid=17149, Unknown=0, NotChecked=0, Total=21462 [2022-11-18 20:50:20,980 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 1005 mSDsluCounter, 2554 mSDsCounter, 0 mSdLazyCounter, 4400 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 4425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:20,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 2649 Invalid, 4425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4400 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 20:50:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-18 20:50:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 235. [2022-11-18 20:50:20,984 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) [2022-11-18 20:50:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-11-18 20:50:20,985 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 228 [2022-11-18 20:50:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:20,985 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-11-18 20:50:20,985 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) [2022-11-18 20:50:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-11-18 20:50:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-11-18 20:50:20,987 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:20,987 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:20,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:21,195 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)] === [2022-11-18 20:50:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1542886758, now seen corresponding path program 35 times [2022-11-18 20:50:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021945895] [2022-11-18 20:50:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 89 proven. 2398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021945895] [2022-11-18 20:50:24,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021945895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:24,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852023064] [2022-11-18 20:50:24,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:50:24,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:24,520 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:24,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:50:25,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-11-18 20:50:25,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 138 conjunts are in the unsatisfiable core [2022-11-18 20:50:25,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:25,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:50:26,940 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 [2022-11-18 20:50:31,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:50:31,192 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 [2022-11-18 20:50:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:31,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:36,376 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 [2022-11-18 20:50:36,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:50:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2487 backedges. 861 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:42,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852023064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:42,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:42,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 155 [2022-11-18 20:50:42,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787441474] [2022-11-18 20:50:42,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:42,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-11-18 20:50:42,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:42,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-11-18 20:50:42,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1943, Invalid=21927, Unknown=0, NotChecked=0, Total=23870 [2022-11-18 20:50:42,379 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) [2022-11-18 20:50:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:49,151 INFO L93 Difference]: Finished difference Result 390 states and 391 transitions. [2022-11-18 20:50:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-18 20:50:49,152 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 [2022-11-18 20:50:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:49,153 INFO L225 Difference]: With dead ends: 390 [2022-11-18 20:50:49,154 INFO L226 Difference]: Without dead ends: 253 [2022-11-18 20:50:49,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6019 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=2736, Invalid=32046, Unknown=0, NotChecked=0, Total=34782 [2022-11-18 20:50:49,156 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 446 mSDsluCounter, 5029 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 5126 SdHoareTripleChecker+Invalid, 5245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 548 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:49,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 5126 Invalid, 5245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4671 Invalid, 0 Unknown, 548 Unchecked, 2.5s Time] [2022-11-18 20:50:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-18 20:50:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 245. [2022-11-18 20:50:49,160 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) [2022-11-18 20:50:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2022-11-18 20:50:49,161 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 234 [2022-11-18 20:50:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:49,162 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2022-11-18 20:50:49,162 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) [2022-11-18 20:50:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2022-11-18 20:50:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-11-18 20:50:49,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:49,164 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:49,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:49,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-18 20:50:49,372 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)] === [2022-11-18 20:50:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1261679165, now seen corresponding path program 36 times [2022-11-18 20:50:49,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:49,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109449631] [2022-11-18 20:50:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:52,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:52,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109449631] [2022-11-18 20:50:52,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109449631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:50:52,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636114306] [2022-11-18 20:50:52,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:50:52,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:52,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:52,800 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:52,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 20:50:55,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-11-18 20:50:55,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 157 conjunts are in the unsatisfiable core [2022-11-18 20:50:55,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:57,032 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 [2022-11-18 20:50:57,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:50:57,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:57,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:57,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-18 20:50:57,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:50:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2715 backedges. 93 proven. 2622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:58,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636114306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:58,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:50:58,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 87 [2022-11-18 20:50:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138752638] [2022-11-18 20:50:58,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-18 20:50:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-18 20:50:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=7263, Unknown=0, NotChecked=0, Total=7482 [2022-11-18 20:50:58,406 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) [2022-11-18 20:51:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:05,890 INFO L93 Difference]: Finished difference Result 395 states and 396 transitions. [2022-11-18 20:51:05,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-18 20:51:05,891 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 [2022-11-18 20:51:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:05,892 INFO L225 Difference]: With dead ends: 395 [2022-11-18 20:51:05,892 INFO L226 Difference]: Without dead ends: 252 [2022-11-18 20:51:05,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 453 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2087 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=646, Invalid=18536, Unknown=0, NotChecked=0, Total=19182 [2022-11-18 20:51:05,893 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 654 mSDsluCounter, 5886 mSDsCounter, 0 mSdLazyCounter, 9103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 5983 SdHoareTripleChecker+Invalid, 9390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 9103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:05,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 5983 Invalid, 9390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 9103 Invalid, 0 Unknown, 260 Unchecked, 4.1s Time] [2022-11-18 20:51:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-18 20:51:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2022-11-18 20:51:05,897 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) [2022-11-18 20:51:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-11-18 20:51:05,898 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 244 [2022-11-18 20:51:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:05,898 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-11-18 20:51:05,899 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) [2022-11-18 20:51:05,899 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-11-18 20:51:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-11-18 20:51:05,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:05,900 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:05,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:06,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-18 20:51:06,115 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)] === [2022-11-18 20:51:06,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:06,116 INFO L85 PathProgramCache]: Analyzing trace with hash 956513856, now seen corresponding path program 37 times [2022-11-18 20:51:06,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:06,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122796190] [2022-11-18 20:51:06,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:06,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 946 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:09,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122796190] [2022-11-18 20:51:09,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122796190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:09,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987587289] [2022-11-18 20:51:09,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:51:09,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:09,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:09,553 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:09,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 20:51:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-18 20:51:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:11,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:14,048 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 [2022-11-18 20:51:15,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 1035 proven. 1773 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:15,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987587289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:15,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:15,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 107 [2022-11-18 20:51:15,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509766176] [2022-11-18 20:51:15,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:15,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-18 20:51:15,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:15,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-18 20:51:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=10152, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 20:51:15,282 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) [2022-11-18 20:51:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:19,664 INFO L93 Difference]: Finished difference Result 260 states and 261 transitions. [2022-11-18 20:51:19,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:51:19,665 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 [2022-11-18 20:51:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:19,666 INFO L225 Difference]: With dead ends: 260 [2022-11-18 20:51:19,666 INFO L226 Difference]: Without dead ends: 260 [2022-11-18 20:51:19,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 415 SyntacticMatches, 25 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6829 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=3345, Invalid=15015, Unknown=0, NotChecked=0, Total=18360 [2022-11-18 20:51:19,668 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2062 mSDsluCounter, 3017 mSDsCounter, 0 mSdLazyCounter, 4976 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2062 SdHoareTripleChecker+Valid, 3120 SdHoareTripleChecker+Invalid, 4989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:19,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2062 Valid, 3120 Invalid, 4989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4976 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 20:51:19,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-18 20:51:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 255. [2022-11-18 20:51:19,672 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) [2022-11-18 20:51:19,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 256 transitions. [2022-11-18 20:51:19,673 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 256 transitions. Word has length 248 [2022-11-18 20:51:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:19,673 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 256 transitions. [2022-11-18 20:51:19,673 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) [2022-11-18 20:51:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 256 transitions. [2022-11-18 20:51:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-11-18 20:51:19,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:19,675 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:19,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-18 20:51:19,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-18 20:51:19,882 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)] === [2022-11-18 20:51:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 838164, now seen corresponding path program 38 times [2022-11-18 20:51:19,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:19,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033451955] [2022-11-18 20:51:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:19,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 97 proven. 2856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033451955] [2022-11-18 20:51:23,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033451955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:23,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883555227] [2022-11-18 20:51:23,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:51:23,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:23,521 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:23,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-18 20:51:23,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:51:23,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:23,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 144 conjunts are in the unsatisfiable core [2022-11-18 20:51:23,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:25,416 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 [2022-11-18 20:51:31,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:51:31,374 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 [2022-11-18 20:51:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:31,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:37,658 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 [2022-11-18 20:51:37,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:51:37,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-18 20:51:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2953 backedges. 1035 proven. 1918 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:39,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883555227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:39,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:39,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 144 [2022-11-18 20:51:39,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886987650] [2022-11-18 20:51:39,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:39,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-11-18 20:51:39,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-11-18 20:51:39,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=19256, Unknown=0, NotChecked=0, Total=20592 [2022-11-18 20:51:39,207 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) [2022-11-18 20:51:46,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:46,284 INFO L93 Difference]: Finished difference Result 422 states and 423 transitions. [2022-11-18 20:51:46,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-18 20:51:46,285 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 [2022-11-18 20:51:46,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:46,286 INFO L225 Difference]: With dead ends: 422 [2022-11-18 20:51:46,286 INFO L226 Difference]: Without dead ends: 273 [2022-11-18 20:51:46,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 466 SyntacticMatches, 28 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6725 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=2070, Invalid=29436, Unknown=0, NotChecked=0, Total=31506 [2022-11-18 20:51:46,288 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 627 mSDsluCounter, 6357 mSDsCounter, 0 mSdLazyCounter, 4391 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 6462 SdHoareTripleChecker+Invalid, 5279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 4391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 861 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:46,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 6462 Invalid, 5279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 4391 Invalid, 0 Unknown, 861 Unchecked, 2.2s Time] [2022-11-18 20:51:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-18 20:51:46,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 265. [2022-11-18 20:51:46,292 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) [2022-11-18 20:51:46,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-11-18 20:51:46,293 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 254 [2022-11-18 20:51:46,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:46,293 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-11-18 20:51:46,294 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) [2022-11-18 20:51:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-11-18 20:51:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-11-18 20:51:46,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:46,295 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:46,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-18 20:51:46,503 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)] === [2022-11-18 20:51:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1268757269, now seen corresponding path program 39 times [2022-11-18 20:51:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392790041] [2022-11-18 20:51:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:50,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392790041] [2022-11-18 20:51:50,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392790041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:50,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256854939] [2022-11-18 20:51:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:51:50,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:50,186 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:50,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-18 20:51:53,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-18 20:51:53,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 171 conjunts are in the unsatisfiable core [2022-11-18 20:51:53,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:55,295 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 [2022-11-18 20:51:55,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:51:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:56,282 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 [2022-11-18 20:51:56,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:51:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3201 backedges. 101 proven. 3100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:56,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256854939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:56,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:56,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 93 [2022-11-18 20:51:56,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226533543] [2022-11-18 20:51:56,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-18 20:51:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-18 20:51:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=8323, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 20:51:56,751 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) [2022-11-18 20:52:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:05,626 INFO L93 Difference]: Finished difference Result 427 states and 428 transitions. [2022-11-18 20:52:05,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-18 20:52:05,627 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 [2022-11-18 20:52:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:05,627 INFO L225 Difference]: With dead ends: 427 [2022-11-18 20:52:05,627 INFO L226 Difference]: Without dead ends: 272 [2022-11-18 20:52:05,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 491 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=783, Invalid=20973, Unknown=0, NotChecked=0, Total=21756 [2022-11-18 20:52:05,629 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 837 mSDsluCounter, 7145 mSDsCounter, 0 mSdLazyCounter, 11110 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 7250 SdHoareTripleChecker+Invalid, 11380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 11110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:05,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 7250 Invalid, 11380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 11110 Invalid, 0 Unknown, 242 Unchecked, 4.9s Time] [2022-11-18 20:52:05,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-18 20:52:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 269. [2022-11-18 20:52:05,633 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) [2022-11-18 20:52:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2022-11-18 20:52:05,634 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 264 [2022-11-18 20:52:05,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:05,634 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2022-11-18 20:52:05,634 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) [2022-11-18 20:52:05,634 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2022-11-18 20:52:05,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-11-18 20:52:05,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:05,636 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:05,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:05,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:05,845 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)] === [2022-11-18 20:52:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1891416430, now seen corresponding path program 40 times [2022-11-18 20:52:05,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:05,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589186323] [2022-11-18 20:52:05,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:05,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1128 proven. 2174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:09,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:09,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589186323] [2022-11-18 20:52:09,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589186323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:09,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155302912] [2022-11-18 20:52:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:52:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:09,168 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:09,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-18 20:52:10,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:52:10,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-18 20:52:10,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:10,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:52:13,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:13,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3302 backedges. 1225 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:19,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155302912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:19,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:52:19,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 140 [2022-11-18 20:52:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475473707] [2022-11-18 20:52:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:19,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-18 20:52:19,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-18 20:52:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=16965, Unknown=0, NotChecked=0, Total=19740 [2022-11-18 20:52:19,064 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) [2022-11-18 20:52:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:23,661 INFO L93 Difference]: Finished difference Result 280 states and 281 transitions. [2022-11-18 20:52:23,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:52:23,661 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 [2022-11-18 20:52:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:23,663 INFO L225 Difference]: With dead ends: 280 [2022-11-18 20:52:23,663 INFO L226 Difference]: Without dead ends: 280 [2022-11-18 20:52:23,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8240 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=5813, Invalid=23257, Unknown=0, NotChecked=0, Total=29070 [2022-11-18 20:52:23,665 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 2375 mSDsluCounter, 3598 mSDsCounter, 0 mSdLazyCounter, 5915 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2375 SdHoareTripleChecker+Valid, 3709 SdHoareTripleChecker+Invalid, 5945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 5915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:23,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2375 Valid, 3709 Invalid, 5945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 5915 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-18 20:52:23,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-18 20:52:23,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 275. [2022-11-18 20:52:23,668 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) [2022-11-18 20:52:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 276 transitions. [2022-11-18 20:52:23,669 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 276 transitions. Word has length 268 [2022-11-18 20:52:23,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:23,669 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 276 transitions. [2022-11-18 20:52:23,669 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) [2022-11-18 20:52:23,670 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 276 transitions. [2022-11-18 20:52:23,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-11-18 20:52:23,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:23,671 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:23,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:23,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:23,881 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)] === [2022-11-18 20:52:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:23,881 INFO L85 PathProgramCache]: Analyzing trace with hash -388191550, now seen corresponding path program 41 times [2022-11-18 20:52:23,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:23,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865409437] [2022-11-18 20:52:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:28,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:28,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865409437] [2022-11-18 20:52:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865409437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:28,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128801274] [2022-11-18 20:52:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:52:28,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:28,073 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:28,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-18 20:52:33,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2022-11-18 20:52:33,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 177 conjunts are in the unsatisfiable core [2022-11-18 20:52:33,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:35,100 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 [2022-11-18 20:52:35,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:52:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:35,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:36,145 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 [2022-11-18 20:52:36,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:52:36,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3459 backedges. 105 proven. 3354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:36,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128801274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:36,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:52:36,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 96 [2022-11-18 20:52:36,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141709018] [2022-11-18 20:52:36,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-18 20:52:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:52:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-18 20:52:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=8880, Unknown=0, NotChecked=0, Total=9120 [2022-11-18 20:52:36,633 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) [2022-11-18 20:52:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:45,845 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2022-11-18 20:52:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-11-18 20:52:45,846 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 [2022-11-18 20:52:45,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:45,847 INFO L225 Difference]: With dead ends: 443 [2022-11-18 20:52:45,847 INFO L226 Difference]: Without dead ends: 282 [2022-11-18 20:52:45,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=712, Invalid=22850, Unknown=0, NotChecked=0, Total=23562 [2022-11-18 20:52:45,849 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 561 mSDsluCounter, 7476 mSDsCounter, 0 mSdLazyCounter, 11633 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 7585 SdHoareTripleChecker+Invalid, 11781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 11633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:45,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 7585 Invalid, 11781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 11633 Invalid, 0 Unknown, 120 Unchecked, 5.1s Time] [2022-11-18 20:52:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-18 20:52:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 279. [2022-11-18 20:52:45,853 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) [2022-11-18 20:52:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 280 transitions. [2022-11-18 20:52:45,854 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 280 transitions. Word has length 274 [2022-11-18 20:52:45,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:45,855 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 280 transitions. [2022-11-18 20:52:45,855 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) [2022-11-18 20:52:45,855 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 280 transitions. [2022-11-18 20:52:45,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-18 20:52:45,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:45,857 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:45,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:46,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-18 20:52:46,068 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)] === [2022-11-18 20:52:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1901490299, now seen corresponding path program 42 times [2022-11-18 20:52:46,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:52:46,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403507034] [2022-11-18 20:52:46,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:46,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:52:46,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1225 proven. 2339 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:52:49,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403507034] [2022-11-18 20:52:49,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403507034] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:52:49,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156731397] [2022-11-18 20:52:49,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:52:49,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:52:49,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:52:49,450 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:52:49,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-18 20:52:55,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-11-18 20:52:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-18 20:52:55,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:59,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:02,309 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 [2022-11-18 20:53:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3564 backedges. 1326 proven. 2238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:03,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156731397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:03,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:53:03,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59, 59] total 146 [2022-11-18 20:53:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294418767] [2022-11-18 20:53:03,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:03,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-11-18 20:53:03,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:03,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-11-18 20:53:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3301, Invalid=18161, Unknown=0, NotChecked=0, Total=21462 [2022-11-18 20:53:03,674 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) [2022-11-18 20:53:06,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:06,943 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2022-11-18 20:53:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:53:06,943 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 [2022-11-18 20:53:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:06,944 INFO L225 Difference]: With dead ends: 290 [2022-11-18 20:53:06,944 INFO L226 Difference]: Without dead ends: 290 [2022-11-18 20:53:06,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 439 SyntacticMatches, 28 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12417 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=6139, Invalid=25367, Unknown=0, NotChecked=0, Total=31506 [2022-11-18 20:53:06,946 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1431 mSDsluCounter, 2159 mSDsCounter, 0 mSdLazyCounter, 3363 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1431 SdHoareTripleChecker+Valid, 2274 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:06,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1431 Valid, 2274 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3363 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-18 20:53:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-18 20:53:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 285. [2022-11-18 20:53:06,951 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) [2022-11-18 20:53:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 286 transitions. [2022-11-18 20:53:06,951 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 286 transitions. Word has length 278 [2022-11-18 20:53:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:06,952 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 286 transitions. [2022-11-18 20:53:06,952 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) [2022-11-18 20:53:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 286 transitions. [2022-11-18 20:53:06,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-18 20:53:06,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:06,954 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:06,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:07,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:07,165 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)] === [2022-11-18 20:53:07,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash 469783449, now seen corresponding path program 43 times [2022-11-18 20:53:07,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:07,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642555659] [2022-11-18 20:53:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:07,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642555659] [2022-11-18 20:53:11,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642555659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:11,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265079749] [2022-11-18 20:53:11,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:53:11,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:11,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:11,862 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:11,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-18 20:53:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 183 conjunts are in the unsatisfiable core [2022-11-18 20:53:12,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:14,423 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 [2022-11-18 20:53:15,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:53:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:15,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:15,571 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 [2022-11-18 20:53:15,576 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 [2022-11-18 20:53:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3727 backedges. 109 proven. 3618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:16,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265079749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:16,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:53:16,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 99 [2022-11-18 20:53:16,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863971992] [2022-11-18 20:53:16,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:16,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-11-18 20:53:16,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-11-18 20:53:16,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9455, Unknown=0, NotChecked=0, Total=9702 [2022-11-18 20:53:16,081 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) [2022-11-18 20:53:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:26,124 INFO L93 Difference]: Finished difference Result 459 states and 460 transitions. [2022-11-18 20:53:26,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-11-18 20:53:26,124 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 [2022-11-18 20:53:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:26,126 INFO L225 Difference]: With dead ends: 459 [2022-11-18 20:53:26,126 INFO L226 Difference]: Without dead ends: 292 [2022-11-18 20:53:26,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 529 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=835, Invalid=23971, Unknown=0, NotChecked=0, Total=24806 [2022-11-18 20:53:26,128 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 906 mSDsluCounter, 7957 mSDsCounter, 0 mSdLazyCounter, 12488 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 8070 SdHoareTripleChecker+Invalid, 12665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 12488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:26,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 8070 Invalid, 12665 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 12488 Invalid, 0 Unknown, 146 Unchecked, 5.5s Time] [2022-11-18 20:53:26,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-11-18 20:53:26,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2022-11-18 20:53:26,133 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) [2022-11-18 20:53:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-11-18 20:53:26,133 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2022-11-18 20:53:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:26,134 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-11-18 20:53:26,134 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) [2022-11-18 20:53:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-11-18 20:53:26,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-18 20:53:26,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:26,136 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:26,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-18 20:53:26,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:26,344 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)] === [2022-11-18 20:53:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 204759196, now seen corresponding path program 44 times [2022-11-18 20:53:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:26,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562917436] [2022-11-18 20:53:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:26,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1326 proven. 2510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:29,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562917436] [2022-11-18 20:53:29,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562917436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:29,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345171973] [2022-11-18 20:53:29,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:53:29,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:29,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:29,985 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:29,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-18 20:53:30,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:53:30,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 152 conjunts are in the unsatisfiable core [2022-11-18 20:53:30,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:32,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:35,298 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 [2022-11-18 20:53:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 1431 proven. 2405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:36,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345171973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:36,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:53:36,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 61, 61] total 123 [2022-11-18 20:53:36,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580092441] [2022-11-18 20:53:36,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:36,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-18 20:53:36,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:36,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-18 20:53:36,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1856, Invalid=13396, Unknown=0, NotChecked=0, Total=15252 [2022-11-18 20:53:36,766 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) [2022-11-18 20:53:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:41,983 INFO L93 Difference]: Finished difference Result 300 states and 301 transitions. [2022-11-18 20:53:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:53:41,984 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 [2022-11-18 20:53:41,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:41,985 INFO L225 Difference]: With dead ends: 300 [2022-11-18 20:53:41,985 INFO L226 Difference]: Without dead ends: 300 [2022-11-18 20:53:41,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 483 SyntacticMatches, 29 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9143 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=4395, Invalid=19785, Unknown=0, NotChecked=0, Total=24180 [2022-11-18 20:53:41,986 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2365 mSDsluCounter, 4146 mSDsCounter, 0 mSdLazyCounter, 6727 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 4265 SdHoareTripleChecker+Invalid, 6735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:41,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2365 Valid, 4265 Invalid, 6735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 6727 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:53:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-11-18 20:53:41,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2022-11-18 20:53:41,990 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) [2022-11-18 20:53:41,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-11-18 20:53:41,991 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 288 [2022-11-18 20:53:41,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:41,991 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-11-18 20:53:41,992 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) [2022-11-18 20:53:41,992 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-11-18 20:53:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-11-18 20:53:41,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:41,994 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:42,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-18 20:53:42,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-18 20:53:42,203 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)] === [2022-11-18 20:53:42,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:42,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2129021072, now seen corresponding path program 45 times [2022-11-18 20:53:42,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:53:42,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550987057] [2022-11-18 20:53:42,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:42,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:53:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:53:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:46,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:53:46,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550987057] [2022-11-18 20:53:46,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550987057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:53:46,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323108553] [2022-11-18 20:53:46,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:53:46,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:53:46,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:53:46,760 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:53:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-18 20:53:54,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-11-18 20:53:54,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:53:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 187 conjunts are in the unsatisfiable core [2022-11-18 20:53:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:53:56,470 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 [2022-11-18 20:53:57,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:53:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:57,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:53:57,583 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 [2022-11-18 20:53:57,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:53:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 113 proven. 3892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:53:58,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323108553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:53:58,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:53:58,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 102 [2022-11-18 20:53:58,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863339802] [2022-11-18 20:53:58,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:53:58,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-18 20:53:58,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:53:58,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-18 20:53:58,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=10048, Unknown=0, NotChecked=0, Total=10302 [2022-11-18 20:53:58,105 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) [2022-11-18 20:54:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:08,781 INFO L93 Difference]: Finished difference Result 475 states and 476 transitions. [2022-11-18 20:54:08,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-11-18 20:54:08,782 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 [2022-11-18 20:54:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:08,783 INFO L225 Difference]: With dead ends: 475 [2022-11-18 20:54:08,783 INFO L226 Difference]: Without dead ends: 302 [2022-11-18 20:54:08,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 548 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2751 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=861, Invalid=25545, Unknown=0, NotChecked=0, Total=26406 [2022-11-18 20:54:08,786 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1098 mSDsluCounter, 8621 mSDsCounter, 0 mSdLazyCounter, 13427 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1098 SdHoareTripleChecker+Valid, 8738 SdHoareTripleChecker+Invalid, 13630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 13427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:08,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1098 Valid, 8738 Invalid, 13630 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [30 Valid, 13427 Invalid, 0 Unknown, 173 Unchecked, 5.9s Time] [2022-11-18 20:54:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-18 20:54:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 299. [2022-11-18 20:54:08,790 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) [2022-11-18 20:54:08,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-11-18 20:54:08,790 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 294 [2022-11-18 20:54:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:08,791 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-11-18 20:54:08,791 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) [2022-11-18 20:54:08,791 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-11-18 20:54:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-11-18 20:54:08,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:08,793 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:08,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:09,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-18 20:54:09,003 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)] === [2022-11-18 20:54:09,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash 470785203, now seen corresponding path program 46 times [2022-11-18 20:54:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:09,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522776387] [2022-11-18 20:54:09,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:09,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1431 proven. 2687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:12,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:12,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522776387] [2022-11-18 20:54:12,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522776387] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:12,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274225396] [2022-11-18 20:54:12,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:54:12,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:12,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:12,823 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:12,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-18 20:54:14,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:54:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 161 conjunts are in the unsatisfiable core [2022-11-18 20:54:14,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:14,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:54:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:17,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4118 backedges. 1540 proven. 2578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:24,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274225396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:24,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:54:24,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 155 [2022-11-18 20:54:24,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535538807] [2022-11-18 20:54:24,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:24,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-11-18 20:54:24,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-11-18 20:54:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3396, Invalid=20784, Unknown=0, NotChecked=0, Total=24180 [2022-11-18 20:54:24,260 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) [2022-11-18 20:54:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:29,586 INFO L93 Difference]: Finished difference Result 310 states and 311 transitions. [2022-11-18 20:54:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-18 20:54:29,587 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 [2022-11-18 20:54:29,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:29,588 INFO L225 Difference]: With dead ends: 310 [2022-11-18 20:54:29,588 INFO L226 Difference]: Without dead ends: 310 [2022-11-18 20:54:29,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=7085, Invalid=28447, Unknown=0, NotChecked=0, Total=35532 [2022-11-18 20:54:29,592 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 2055 mSDsluCounter, 4089 mSDsCounter, 0 mSdLazyCounter, 6753 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2055 SdHoareTripleChecker+Valid, 4212 SdHoareTripleChecker+Invalid, 6786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 6753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:29,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2055 Valid, 4212 Invalid, 6786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 6753 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-18 20:54:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-18 20:54:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 305. [2022-11-18 20:54:29,610 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) [2022-11-18 20:54:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 306 transitions. [2022-11-18 20:54:29,611 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 306 transitions. Word has length 298 [2022-11-18 20:54:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:29,611 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 306 transitions. [2022-11-18 20:54:29,611 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) [2022-11-18 20:54:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 306 transitions. [2022-11-18 20:54:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-11-18 20:54:29,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:29,613 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:29,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:29,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-18 20:54:29,823 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)] === [2022-11-18 20:54:29,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:29,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1220065721, now seen corresponding path program 47 times [2022-11-18 20:54:29,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:29,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968525032] [2022-11-18 20:54:29,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:29,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:34,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:34,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968525032] [2022-11-18 20:54:34,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968525032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:34,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541937487] [2022-11-18 20:54:34,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:54:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:34,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:34,967 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:34,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-18 20:54:36,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2022-11-18 20:54:36,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 195 conjunts are in the unsatisfiable core [2022-11-18 20:54:36,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:38,851 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 [2022-11-18 20:54:39,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:54:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:39,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:40,047 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 [2022-11-18 20:54:40,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-18 20:54:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 117 proven. 4176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:40,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541937487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:40,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:54:40,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 105 [2022-11-18 20:54:40,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199331341] [2022-11-18 20:54:40,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:40,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-18 20:54:40,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:40,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-18 20:54:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=10659, Unknown=0, NotChecked=0, Total=10920 [2022-11-18 20:54:40,574 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) [2022-11-18 20:54:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:52,501 INFO L93 Difference]: Finished difference Result 491 states and 492 transitions. [2022-11-18 20:54:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-18 20:54:52,501 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 [2022-11-18 20:54:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:52,503 INFO L225 Difference]: With dead ends: 491 [2022-11-18 20:54:52,503 INFO L226 Difference]: Without dead ends: 312 [2022-11-18 20:54:52,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 736 GetRequests, 567 SyntacticMatches, 3 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2919 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=887, Invalid=27169, Unknown=0, NotChecked=0, Total=28056 [2022-11-18 20:54:52,504 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 958 mSDsluCounter, 9674 mSDsCounter, 0 mSdLazyCounter, 15092 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 958 SdHoareTripleChecker+Valid, 9795 SdHoareTripleChecker+Invalid, 15307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 15092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:52,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [958 Valid, 9795 Invalid, 15307 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [31 Valid, 15092 Invalid, 0 Unknown, 184 Unchecked, 6.7s Time] [2022-11-18 20:54:52,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-18 20:54:52,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-11-18 20:54:52,508 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) [2022-11-18 20:54:52,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 310 transitions. [2022-11-18 20:54:52,509 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 310 transitions. Word has length 304 [2022-11-18 20:54:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:52,509 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 310 transitions. [2022-11-18 20:54:52,509 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) [2022-11-18 20:54:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 310 transitions. [2022-11-18 20:54:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-11-18 20:54:52,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:52,511 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:52,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:52,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-18 20:54:52,721 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)] === [2022-11-18 20:54:52,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:52,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1874703306, now seen corresponding path program 48 times [2022-11-18 20:54:52,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:52,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142816011] [2022-11-18 20:54:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:52,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:54:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 1540 proven. 2870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:54:57,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142816011] [2022-11-18 20:54:57,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142816011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:57,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800974677] [2022-11-18 20:54:57,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:54:57,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:57,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:57,706 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:57,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-18 20:55:02,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-11-18 20:55:02,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:02,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-18 20:55:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:02,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:55:03,451 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 [2022-11-18 20:55:06,954 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:55:06,954 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 [2022-11-18 20:55:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 682 proven. 241 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-11-18 20:55:07,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:10,371 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 [2022-11-18 20:55:10,377 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 [2022-11-18 20:55:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4410 backedges. 726 proven. 197 refuted. 0 times theorem prover too weak. 3487 trivial. 0 not checked. [2022-11-18 20:55:11,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800974677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:11,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:55:11,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-11-18 20:55:11,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134362871] [2022-11-18 20:55:11,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:11,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-18 20:55:11,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:11,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-18 20:55:11,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=6527, Unknown=0, NotChecked=0, Total=7482 [2022-11-18 20:55:11,240 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) [2022-11-18 20:56:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:13,430 INFO L93 Difference]: Finished difference Result 314 states and 315 transitions. [2022-11-18 20:56:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:56:13,431 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 [2022-11-18 20:56:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:13,431 INFO L225 Difference]: With dead ends: 314 [2022-11-18 20:56:13,431 INFO L226 Difference]: Without dead ends: 0 [2022-11-18 20:56:13,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 838 GetRequests, 594 SyntacticMatches, 90 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12532 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=2933, Invalid=21247, Unknown=0, NotChecked=0, Total=24180 [2022-11-18 20:56:13,432 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 509 mSDsluCounter, 4404 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 4528 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:13,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 4528 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1771 Invalid, 0 Unknown, 236 Unchecked, 1.1s Time] [2022-11-18 20:56:13,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-18 20:56:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-18 20:56:13,433 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) [2022-11-18 20:56:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-18 20:56:13,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 308 [2022-11-18 20:56:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:13,433 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-18 20:56:13,434 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) [2022-11-18 20:56:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-18 20:56:13,434 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-18 20:56:13,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2022-11-18 20:56:13,437 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-11-18 20:56:13,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-18 20:56:13,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-18 20:56:13,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-11-18 20:56:13,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2022-11-18 20:56:13,438 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2022-11-18 20:56:13,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2022-11-18 20:56:13,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2022-11-18 20:56:13,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 11 remaining) [2022-11-18 20:56:13,439 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-18 20:56:13,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:13,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:13,654 INFO L444 BasicCegarLoop]: Path program histogram: [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:13,655 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 20:56:13,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 08:56:13 BoogieIcfgContainer [2022-11-18 20:56:13,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 20:56:13,658 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:56:13,658 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:56:13,659 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:56:13,659 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:45:18" (3/4) ... [2022-11-18 20:56:13,662 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-18 20:56:13,673 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2022-11-18 20:56:13,673 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-18 20:56:13,673 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-18 20:56:13,673 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-18 20:56:13,704 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 20:56:13,704 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:56:13,705 INFO L158 Benchmark]: Toolchain (without parser) took 656139.62ms. Allocated memory was 130.0MB in the beginning and 685.8MB in the end (delta: 555.7MB). Free memory was 89.3MB in the beginning and 375.7MB in the end (delta: -286.4MB). Peak memory consumption was 268.1MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,705 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 130.0MB. Free memory was 106.8MB in the beginning and 106.7MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:56:13,705 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.06ms. Allocated memory is still 130.0MB. Free memory was 89.1MB in the beginning and 100.1MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,705 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.71ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 98.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,705 INFO L158 Benchmark]: Boogie Preprocessor took 55.09ms. Allocated memory is still 130.0MB. Free memory was 98.0MB in the beginning and 96.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:56:13,705 INFO L158 Benchmark]: RCFGBuilder took 402.15ms. Allocated memory is still 130.0MB. Free memory was 96.7MB in the beginning and 84.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,706 INFO L158 Benchmark]: TraceAbstraction took 655143.71ms. Allocated memory was 130.0MB in the beginning and 685.8MB in the end (delta: 555.7MB). Free memory was 83.3MB in the beginning and 379.4MB in the end (delta: -296.1MB). Peak memory consumption was 261.8MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,706 INFO L158 Benchmark]: Witness Printer took 45.95ms. Allocated memory is still 685.8MB. Free memory was 378.3MB in the beginning and 375.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:56:13,706 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 130.0MB. Free memory was 106.8MB in the beginning and 106.7MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.06ms. Allocated memory is still 130.0MB. Free memory was 89.1MB in the beginning and 100.1MB in the end (delta: -10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.71ms. Allocated memory is still 130.0MB. Free memory was 99.4MB in the beginning and 98.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.09ms. Allocated memory is still 130.0MB. Free memory was 98.0MB in the beginning and 96.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 402.15ms. Allocated memory is still 130.0MB. Free memory was 96.7MB in the beginning and 84.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 655143.71ms. Allocated memory was 130.0MB in the beginning and 685.8MB in the end (delta: 555.7MB). Free memory was 83.3MB in the beginning and 379.4MB in the end (delta: -296.1MB). Peak memory consumption was 261.8MB. Max. memory is 16.1GB. * Witness Printer took 45.95ms. Allocated memory is still 685.8MB. Free memory was 378.3MB in the beginning and 375.7MB 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: 655.1s, OverallIterations: 61, TraceHistogramMax: 30, PathProgramHistogramMax: 48, EmptinessCheckTime: 0.1s, AutomataDifference: 261.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32992 SdHoareTripleChecker+Valid, 92.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32992 mSDsluCounter, 136828 SdHoareTripleChecker+Invalid, 78.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 6311 IncrementalHoareTripleChecker+Unchecked, 133302 mSDsCounter, 884 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 185690 IncrementalHoareTripleChecker+Invalid, 192885 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 884 mSolverCounterUnsat, 3526 mSDtfsCounter, 185690 mSolverCounterSat, 1.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19631 GetRequests, 14061 SyntacticMatches, 422 SemanticMatches, 5148 ConstructedPredicates, 0 IntricatePredicates, 34 DeprecatedPredicates, 145572 ImplicationChecksByTransitivity, 369.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=309occurred in iteration=60, InterpolantAutomatonStates: 2453, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 61 MinimizatonAttempts, 388 StatesRemovedByMinimization, 56 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 43.5s SatisfiabilityAnalysisTime, 331.6s 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! [2022-11-18 20:56:13,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3848e56-be4e-432e-84b1-6e9a955e14e6/bin/uautomizer-TMbwUNV5ro/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