./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 --- 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-4e7fbc6 [2022-11-23 13:56:39,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:56:39,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:56:39,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:56:39,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:56:39,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:56:39,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:56:39,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:56:39,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:56:39,093 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:56:39,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:56:39,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:56:39,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:56:39,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:56:39,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:56:39,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:56:39,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:56:39,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:56:39,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:56:39,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:56:39,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:56:39,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:56:39,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:56:39,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:56:39,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:56:39,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:56:39,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:56:39,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:56:39,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:56:39,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:56:39,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:56:39,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:56:39,128 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:56:39,129 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:56:39,130 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:56:39,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:56:39,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:56:39,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:56:39,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:56:39,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:56:39,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:56:39,144 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 13:56:39,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:56:39,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:56:39,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:56:39,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:56:39,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:56:39,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:56:39,200 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:56:39,201 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:56:39,201 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:56:39,201 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:56:39,202 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:56:39,202 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:56:39,203 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:56:39,203 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:56:39,203 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:56:39,203 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:56:39,203 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:56:39,204 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:56:39,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 13:56:39,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 13:56:39,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:56:39,205 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:56:39,205 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 13:56:39,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:56:39,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:56:39,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:56:39,206 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 13:56:39,207 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 13:56:39,207 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 13:56:39,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:56:39,208 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 13:56:39,208 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:56:39,208 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:56:39,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:56:39,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:56:39,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:56:39,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:56:39,209 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:56:39,210 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:56:39,210 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:56:39,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:56:39,216 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:56:39,216 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_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 [2022-11-23 13:56:39,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:56:39,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:56:39,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:56:39,515 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:56:39,515 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:56:39,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2022-11-23 13:56:42,661 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:56:42,888 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:56:42,889 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2022-11-23 13:56:42,903 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/data/c26e246b5/b4abb2be7c1e472aab9656831de29aa6/FLAG0740c068d [2022-11-23 13:56:42,917 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/data/c26e246b5/b4abb2be7c1e472aab9656831de29aa6 [2022-11-23 13:56:42,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:56:42,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:56:42,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:56:42,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:56:42,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:56:42,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:42" (1/1) ... [2022-11-23 13:56:42,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d73de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:42, skipping insertion in model container [2022-11-23 13:56:42,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:56:42" (1/1) ... [2022-11-23 13:56:42,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:56:43,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:56:43,260 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:56:43,269 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:56:43,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:56:43,336 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:56:43,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43 WrapperNode [2022-11-23 13:56:43,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:56:43,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:56:43,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:56:43,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:56:43,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,397 INFO L138 Inliner]: procedures = 126, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2022-11-23 13:56:43,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:56:43,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:56:43,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:56:43,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:56:43,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,431 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,452 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:56:43,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:56:43,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:56:43,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:56:43,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (1/1) ... [2022-11-23 13:56:43,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:56:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:43,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:56:43,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:56:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:56:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 13:56:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:56:43,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:56:43,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:56:43,702 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:56:43,704 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:56:44,137 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:56:44,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:56:44,184 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 13:56:44,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:44 BoogieIcfgContainer [2022-11-23 13:56:44,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:56:44,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:56:44,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:56:44,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:56:44,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:56:42" (1/3) ... [2022-11-23 13:56:44,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee96392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:44, skipping insertion in model container [2022-11-23 13:56:44,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:56:43" (2/3) ... [2022-11-23 13:56:44,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee96392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:56:44, skipping insertion in model container [2022-11-23 13:56:44,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:56:44" (3/3) ... [2022-11-23 13:56:44,196 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-2.i [2022-11-23 13:56:44,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:56:44,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-23 13:56:44,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:56:44,273 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;@25ed5aec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:56:44,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2022-11-23 13:56:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 33 states have (on average 2.484848484848485) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:56:44,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:44,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:56:44,286 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash 153954, now seen corresponding path program 1 times [2022-11-23 13:56:44,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:44,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383825932] [2022-11-23 13:56:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:44,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:44,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383825932] [2022-11-23 13:56:44,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383825932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:44,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:44,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:56:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721355010] [2022-11-23 13:56:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:56:44,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:56:44,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:56:44,766 INFO L87 Difference]: Start difference. First operand has 78 states, 33 states have (on average 2.484848484848485) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:45,025 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2022-11-23 13:56:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:56:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 13:56:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:45,039 INFO L225 Difference]: With dead ends: 87 [2022-11-23 13:56:45,039 INFO L226 Difference]: Without dead ends: 86 [2022-11-23 13:56:45,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:56:45,047 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 47 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:56:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-23 13:56:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2022-11-23 13:56:45,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 33 states have (on average 2.242424242424242) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-11-23 13:56:45,086 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 3 [2022-11-23 13:56:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:45,086 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-11-23 13:56:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-11-23 13:56:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 13:56:45,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:45,087 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 13:56:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:56:45,088 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:45,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 153955, now seen corresponding path program 1 times [2022-11-23 13:56:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:45,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885238860] [2022-11-23 13:56:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:45,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:45,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885238860] [2022-11-23 13:56:45,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885238860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:45,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:45,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:56:45,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123548804] [2022-11-23 13:56:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:45,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:56:45,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:56:45,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:56:45,256 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:45,442 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-11-23 13:56:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:56:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 13:56:45,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:45,444 INFO L225 Difference]: With dead ends: 110 [2022-11-23 13:56:45,444 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 13:56:45,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:56:45,446 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 123 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:45,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 73 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:56:45,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 13:56:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 65. [2022-11-23 13:56:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 35 states have (on average 2.0) internal successors, (70), 64 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) [2022-11-23 13:56:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-23 13:56:45,455 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 3 [2022-11-23 13:56:45,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:45,455 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-23 13:56:45,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-23 13:56:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 13:56:45,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:45,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 13:56:45,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 13:56:45,457 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:45,458 INFO L85 PathProgramCache]: Analyzing trace with hash 4772554, now seen corresponding path program 1 times [2022-11-23 13:56:45,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:45,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762248222] [2022-11-23 13:56:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:45,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:45,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762248222] [2022-11-23 13:56:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762248222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:45,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:45,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:56:45,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263793986] [2022-11-23 13:56:45,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:45,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:45,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:45,502 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:45,576 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-11-23 13:56:45,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:45,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 13:56:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:45,577 INFO L225 Difference]: With dead ends: 74 [2022-11-23 13:56:45,577 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 13:56:45,578 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 [2022-11-23 13:56:45,579 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:45,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 13:56:45,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-11-23 13:56:45,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-11-23 13:56:45,586 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 4 [2022-11-23 13:56:45,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:45,586 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-11-23 13:56:45,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,586 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-11-23 13:56:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 13:56:45,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:45,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 13:56:45,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 13:56:45,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:45,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:45,588 INFO L85 PathProgramCache]: Analyzing trace with hash 4772555, now seen corresponding path program 1 times [2022-11-23 13:56:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:45,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610363490] [2022-11-23 13:56:45,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:45,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:45,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610363490] [2022-11-23 13:56:45,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610363490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:45,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:45,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:56:45,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732982617] [2022-11-23 13:56:45,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:45,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:56:45,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:45,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:56:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:56:45,646 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:45,697 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-11-23 13:56:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:56:45,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 13:56:45,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:45,699 INFO L225 Difference]: With dead ends: 58 [2022-11-23 13:56:45,699 INFO L226 Difference]: Without dead ends: 58 [2022-11-23 13:56:45,701 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 [2022-11-23 13:56:45,711 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 33 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 [2022-11-23 13:56:45,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 33 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:56:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-23 13:56:45,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-23 13:56:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 56 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) [2022-11-23 13:56:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-23 13:56:45,722 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 4 [2022-11-23 13:56:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:45,723 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-23 13:56:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-23 13:56:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:56:45,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:45,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:45,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 13:56:45,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:45,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:45,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1021267267, now seen corresponding path program 1 times [2022-11-23 13:56:45,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:45,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900391773] [2022-11-23 13:56:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:45,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:46,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:46,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900391773] [2022-11-23 13:56:46,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900391773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:46,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:46,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:56:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073326895] [2022-11-23 13:56:46,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:46,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:56:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:46,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:56:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:56:46,068 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) 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) [2022-11-23 13:56:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:46,267 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-11-23 13:56:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 13:56:46,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) 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 [2022-11-23 13:56:46,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:46,274 INFO L225 Difference]: With dead ends: 65 [2022-11-23 13:56:46,275 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 13:56:46,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:56:46,279 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:46,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 241 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:46,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 13:56:46,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-11-23 13:56:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.625) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-11-23 13:56:46,294 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 8 [2022-11-23 13:56:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:46,295 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-11-23 13:56:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) 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) [2022-11-23 13:56:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-11-23 13:56:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:56:46,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:46,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:46,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 13:56:46,298 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1021279276, now seen corresponding path program 1 times [2022-11-23 13:56:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:46,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801525983] [2022-11-23 13:56:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:46,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:46,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:46,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801525983] [2022-11-23 13:56:46,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801525983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:46,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:46,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:56:46,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428082393] [2022-11-23 13:56:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:56:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:46,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:56:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:56:46,470 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:46,594 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-11-23 13:56:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:56:46,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 13:56:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:46,595 INFO L225 Difference]: With dead ends: 73 [2022-11-23 13:56:46,595 INFO L226 Difference]: Without dead ends: 73 [2022-11-23 13:56:46,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-23 13:56:46,596 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 234 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:46,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 34 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-23 13:56:46,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2022-11-23 13:56:46,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.631578947368421) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:46,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-11-23 13:56:46,601 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 8 [2022-11-23 13:56:46,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:46,601 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-11-23 13:56:46,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-11-23 13:56:46,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:56:46,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:46,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:46,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:56:46,602 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:46,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1870884617, now seen corresponding path program 1 times [2022-11-23 13:56:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:46,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538768371] [2022-11-23 13:56:46,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:46,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:46,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538768371] [2022-11-23 13:56:46,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538768371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:46,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:46,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:56:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925210909] [2022-11-23 13:56:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:56:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:56:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:56:46,789 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-23 13:56:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:46,939 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-11-23 13:56:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:56:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-11-23 13:56:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:46,941 INFO L225 Difference]: With dead ends: 70 [2022-11-23 13:56:46,941 INFO L226 Difference]: Without dead ends: 70 [2022-11-23 13:56:46,942 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 [2022-11-23 13:56:46,943 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:46,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 69 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:46,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-23 13:56:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2022-11-23 13:56:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.605263157894737) internal successors, (61), 57 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-11-23 13:56:46,951 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 12 [2022-11-23 13:56:46,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:46,951 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-11-23 13:56:46,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-23 13:56:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-11-23 13:56:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:56:46,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:46,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:46,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 13:56:46,953 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1870884616, now seen corresponding path program 1 times [2022-11-23 13:56:46,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:46,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611970322] [2022-11-23 13:56:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:46,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:47,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:47,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611970322] [2022-11-23 13:56:47,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611970322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:47,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:47,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 13:56:47,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647105376] [2022-11-23 13:56:47,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:47,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:56:47,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:47,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:56:47,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:56:47,311 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-23 13:56:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:47,461 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-11-23 13:56:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:56:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-11-23 13:56:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:47,463 INFO L225 Difference]: With dead ends: 71 [2022-11-23 13:56:47,463 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 13:56:47,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:56:47,464 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 101 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:47,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 70 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 13:56:47,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-11-23 13:56:47,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 56 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) [2022-11-23 13:56:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-11-23 13:56:47,475 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2022-11-23 13:56:47,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:47,475 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-11-23 13:56:47,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-11-23 13:56:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-11-23 13:56:47,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 13:56:47,476 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:47,476 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:47,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 13:56:47,477 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:47,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1870849306, now seen corresponding path program 1 times [2022-11-23 13:56:47,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:47,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966346831] [2022-11-23 13:56:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:47,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:47,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:47,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966346831] [2022-11-23 13:56:47,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966346831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:47,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:47,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 13:56:47,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291489441] [2022-11-23 13:56:47,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:47,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:56:47,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:56:47,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:56:47,541 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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) [2022-11-23 13:56:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:47,583 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2022-11-23 13:56:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:56:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2022-11-23 13:56:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:47,584 INFO L225 Difference]: With dead ends: 59 [2022-11-23 13:56:47,585 INFO L226 Difference]: Without dead ends: 59 [2022-11-23 13:56:47,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:56:47,587 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 46 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:47,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 94 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:56:47,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-23 13:56:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-23 13:56:47,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:47,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-11-23 13:56:47,602 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 12 [2022-11-23 13:56:47,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:47,602 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-11-23 13:56:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2022-11-23 13:56:47,603 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-11-23 13:56:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:56:47,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:47,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 13:56:47,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:47,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:47,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1671255016, now seen corresponding path program 1 times [2022-11-23 13:56:47,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:47,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611514422] [2022-11-23 13:56:47,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:47,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:48,003 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:48,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611514422] [2022-11-23 13:56:48,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611514422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:48,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:48,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 13:56:48,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312699007] [2022-11-23 13:56:48,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:48,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:56:48,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:56:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:56:48,007 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 8 states, 7 states have (on average 2.0) 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) [2022-11-23 13:56:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:48,173 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2022-11-23 13:56:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:56:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) 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 [2022-11-23 13:56:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:48,175 INFO L225 Difference]: With dead ends: 56 [2022-11-23 13:56:48,175 INFO L226 Difference]: Without dead ends: 56 [2022-11-23 13:56:48,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:56:48,176 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:48,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 86 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:48,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-23 13:56:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-11-23 13:56:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-11-23 13:56:48,183 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 14 [2022-11-23 13:56:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:48,183 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-11-23 13:56:48,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) 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) [2022-11-23 13:56:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-11-23 13:56:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:56:48,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:48,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:48,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 13:56:48,185 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:48,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:48,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1671255015, now seen corresponding path program 1 times [2022-11-23 13:56:48,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:48,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323168095] [2022-11-23 13:56:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:48,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:48,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:48,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323168095] [2022-11-23 13:56:48,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323168095] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:48,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:48,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:56:48,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713695488] [2022-11-23 13:56:48,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:48,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:56:48,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:48,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:56:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:56:48,295 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-23 13:56:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:48,390 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-23 13:56:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:56:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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 [2022-11-23 13:56:48,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:48,392 INFO L225 Difference]: With dead ends: 55 [2022-11-23 13:56:48,392 INFO L226 Difference]: Without dead ends: 55 [2022-11-23 13:56:48,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:56:48,393 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:48,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 95 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:56:48,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-23 13:56:48,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-11-23 13:56:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.5) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:48,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-11-23 13:56:48,396 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 14 [2022-11-23 13:56:48,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:48,396 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-11-23 13:56:48,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 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) [2022-11-23 13:56:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-11-23 13:56:48,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:56:48,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:48,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:48,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 13:56:48,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:48,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:48,399 INFO L85 PathProgramCache]: Analyzing trace with hash 269297947, now seen corresponding path program 1 times [2022-11-23 13:56:48,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:48,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473292155] [2022-11-23 13:56:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:48,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:48,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473292155] [2022-11-23 13:56:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473292155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:48,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:48,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:56:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061435433] [2022-11-23 13:56:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:48,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 13:56:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 13:56:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:56:48,965 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-11-23 13:56:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:49,477 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-11-23 13:56:49,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:56:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 [2022-11-23 13:56:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:49,478 INFO L225 Difference]: With dead ends: 104 [2022-11-23 13:56:49,479 INFO L226 Difference]: Without dead ends: 104 [2022-11-23 13:56:49,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-11-23 13:56:49,480 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 255 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:49,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 146 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:56:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-23 13:56:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 64. [2022-11-23 13:56:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 47 states have (on average 1.425531914893617) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-11-23 13:56:49,483 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 15 [2022-11-23 13:56:49,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:49,484 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-11-23 13:56:49,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2022-11-23 13:56:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-11-23 13:56:49,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 13:56:49,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:49,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 13:56:49,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:49,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -241698137, now seen corresponding path program 1 times [2022-11-23 13:56:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:49,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862922998] [2022-11-23 13:56:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:50,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:50,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862922998] [2022-11-23 13:56:50,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862922998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:56:50,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:56:50,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:56:50,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940856630] [2022-11-23 13:56:50,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:56:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 13:56:50,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:56:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 13:56:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:56:50,071 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:56:50,631 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2022-11-23 13:56:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 13:56:50,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 13:56:50,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:56:50,632 INFO L225 Difference]: With dead ends: 103 [2022-11-23 13:56:50,632 INFO L226 Difference]: Without dead ends: 103 [2022-11-23 13:56:50,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-11-23 13:56:50,633 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 190 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:56:50,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 99 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:56:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-23 13:56:50,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2022-11-23 13:56:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 64 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) [2022-11-23 13:56:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-11-23 13:56:50,636 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 16 [2022-11-23 13:56:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:56:50,636 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-11-23 13:56:50,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:56:50,637 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-11-23 13:56:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 13:56:50,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:56:50,637 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:56:50,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 13:56:50,638 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:56:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:56:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 662955681, now seen corresponding path program 1 times [2022-11-23 13:56:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:56:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240896808] [2022-11-23 13:56:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:56:50,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:50,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:56:50,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240896808] [2022-11-23 13:56:50,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240896808] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:56:50,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947855065] [2022-11-23 13:56:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:56:50,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:56:50,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:56:50,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:56:51,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:56:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:56:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 13:56:51,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:56:51,327 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 11 treesize of output 7 [2022-11-23 13:56:51,389 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-23 13:56:51,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-23 13:56:51,493 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 13:56:51,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2022-11-23 13:56:51,596 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 13:56:51,596 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 36 treesize of output 16 [2022-11-23 13:56:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:51,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:56:51,722 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 38 treesize of output 34 [2022-11-23 13:56:52,024 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 13:56:52,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 192 [2022-11-23 13:56:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:56:52,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947855065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:56:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555512774] [2022-11-23 13:56:52,368 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 13:56:52,368 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:56:52,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:56:52,382 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:56:52,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:56:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-23 13:56:52,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-23 13:56:52,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-23 13:56:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-11-23 13:56:52,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 13:56:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2022-11-23 13:56:52,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-23 13:56:52,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-23 13:56:52,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 13:56:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-23 13:56:52,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-11-23 13:56:52,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:52,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 13:56:53,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 19 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-11-23 13:56:53,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,287 INFO L321 Elim1Store]: treesize reduction 76, result has 19.1 percent of original size [2022-11-23 13:56:53,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 566 treesize of output 453 [2022-11-23 13:56:53,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,390 INFO L321 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2022-11-23 13:56:53,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 574 treesize of output 570 [2022-11-23 13:56:53,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:53,441 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 13:56:53,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 586 treesize of output 569 [2022-11-23 13:56:53,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:53,935 INFO L321 Elim1Store]: treesize reduction 342, result has 13.4 percent of original size [2022-11-23 13:56:53,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 584 treesize of output 600 [2022-11-23 13:56:54,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,452 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-23 13:56:54,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1312 treesize of output 999 [2022-11-23 13:56:54,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 414 treesize of output 393 [2022-11-23 13:56:54,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,518 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 13:56:54,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 415 treesize of output 397 [2022-11-23 13:56:54,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,685 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-23 13:56:54,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 407 treesize of output 361 [2022-11-23 13:56:54,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:54,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,736 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-23 13:56:54,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 374 treesize of output 368 [2022-11-23 13:56:54,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:54,773 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 13:56:54,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 354 treesize of output 337 [2022-11-23 13:56:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:55,120 INFO L321 Elim1Store]: treesize reduction 228, result has 11.6 percent of original size [2022-11-23 13:56:55,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 478 treesize of output 472 [2022-11-23 13:56:55,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:55,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,613 INFO L321 Elim1Store]: treesize reduction 76, result has 19.1 percent of original size [2022-11-23 13:56:55,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 566 treesize of output 453 [2022-11-23 13:56:55,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,654 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 13:56:55,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 578 treesize of output 561 [2022-11-23 13:56:55,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:55,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:55,733 INFO L321 Elim1Store]: treesize reduction 96, result has 18.6 percent of original size [2022-11-23 13:56:55,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 574 treesize of output 570 [2022-11-23 13:56:56,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,267 INFO L321 Elim1Store]: treesize reduction 342, result has 13.4 percent of original size [2022-11-23 13:56:56,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 26 case distinctions, treesize of input 584 treesize of output 600 [2022-11-23 13:56:56,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,764 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2022-11-23 13:56:56,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 1312 treesize of output 999 [2022-11-23 13:56:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:56,833 INFO L321 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2022-11-23 13:56:56,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1366 treesize of output 1314 [2022-11-23 13:56:56,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:56,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1365 treesize of output 1328 [2022-11-23 13:56:57,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:57,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:57,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,282 INFO L321 Elim1Store]: treesize reduction 87, result has 14.7 percent of original size [2022-11-23 13:56:57,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 1394 treesize of output 1011 [2022-11-23 13:56:57,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:57,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:56:57,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,377 INFO L321 Elim1Store]: treesize reduction 87, result has 14.7 percent of original size [2022-11-23 13:56:57,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 1141 treesize of output 1093 [2022-11-23 13:56:57,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:56:57,445 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-11-23 13:56:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1097 treesize of output 1064 [2022-11-23 13:56:57,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 13:56:57,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-23 13:56:57,750 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:57:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [555512774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:05,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:57:05,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8, 8] total 29 [2022-11-23 13:57:05,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828827756] [2022-11-23 13:57:05,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 13:57:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 13:57:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2022-11-23 13:57:05,374 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-23 13:57:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:05,965 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-11-23 13:57:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:57:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 16 [2022-11-23 13:57:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:05,966 INFO L225 Difference]: With dead ends: 96 [2022-11-23 13:57:05,966 INFO L226 Difference]: Without dead ends: 96 [2022-11-23 13:57:05,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=184, Invalid=746, Unknown=0, NotChecked=0, Total=930 [2022-11-23 13:57:05,967 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:05,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 53 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:57:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-23 13:57:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2022-11-23 13:57:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-23 13:57:05,970 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 16 [2022-11-23 13:57:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:05,970 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-23 13:57:05,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-11-23 13:57:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-23 13:57:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 13:57:05,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:05,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:05,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 13:57:06,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:57:06,178 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:06,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1097292445, now seen corresponding path program 1 times [2022-11-23 13:57:06,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:06,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364029545] [2022-11-23 13:57:06,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:06,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:06,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:06,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:06,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364029545] [2022-11-23 13:57:06,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364029545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:06,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:06,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 13:57:06,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235593574] [2022-11-23 13:57:06,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:06,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 13:57:06,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 13:57:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:57:06,603 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:07,009 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2022-11-23 13:57:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 13:57:07,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 13:57:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:07,010 INFO L225 Difference]: With dead ends: 90 [2022-11-23 13:57:07,010 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 13:57:07,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-11-23 13:57:07,011 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:07,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 123 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:57:07,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 13:57:07,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2022-11-23 13:57:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 59 states have (on average 1.3728813559322033) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-23 13:57:07,014 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 17 [2022-11-23 13:57:07,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:07,015 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-23 13:57:07,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,015 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-23 13:57:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 13:57:07,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:07,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:07,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 13:57:07,016 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash -343672470, now seen corresponding path program 1 times [2022-11-23 13:57:07,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:07,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610626395] [2022-11-23 13:57:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:07,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:07,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610626395] [2022-11-23 13:57:07,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610626395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:07,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:07,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 13:57:07,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023551913] [2022-11-23 13:57:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:07,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 13:57:07,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:07,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 13:57:07,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 13:57:07,171 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:07,282 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-23 13:57:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:57:07,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 13:57:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:07,283 INFO L225 Difference]: With dead ends: 75 [2022-11-23 13:57:07,283 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 13:57:07,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-11-23 13:57:07,284 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:07,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 28 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:57:07,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 13:57:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-23 13:57:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 74 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2022-11-23 13:57:07,288 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 18 [2022-11-23 13:57:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:07,289 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2022-11-23 13:57:07,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,289 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2022-11-23 13:57:07,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-23 13:57:07,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:07,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:07,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 13:57:07,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:07,294 INFO L85 PathProgramCache]: Analyzing trace with hash -2063911935, now seen corresponding path program 1 times [2022-11-23 13:57:07,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:07,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171696683] [2022-11-23 13:57:07,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:07,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:07,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171696683] [2022-11-23 13:57:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171696683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:07,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:07,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:57:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983938451] [2022-11-23 13:57:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:07,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:07,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:07,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:07,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:07,412 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:07,503 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-11-23 13:57:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:57:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-23 13:57:07,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:07,504 INFO L225 Difference]: With dead ends: 74 [2022-11-23 13:57:07,504 INFO L226 Difference]: Without dead ends: 74 [2022-11-23 13:57:07,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:57:07,505 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:07,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 65 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:57:07,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-23 13:57:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-23 13:57:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 73 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) [2022-11-23 13:57:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-11-23 13:57:07,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 19 [2022-11-23 13:57:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:07,508 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-11-23 13:57:07,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-11-23 13:57:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 13:57:07,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:07,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:07,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 13:57:07,511 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 443239562, now seen corresponding path program 1 times [2022-11-23 13:57:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:07,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114256936] [2022-11-23 13:57:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:07,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:07,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:07,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114256936] [2022-11-23 13:57:07,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114256936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:07,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:07,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:57:07,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223006958] [2022-11-23 13:57:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:07,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:07,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:07,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:07,640 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:07,745 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-11-23 13:57:07,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:57:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-23 13:57:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:07,746 INFO L225 Difference]: With dead ends: 73 [2022-11-23 13:57:07,746 INFO L226 Difference]: Without dead ends: 73 [2022-11-23 13:57:07,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 13:57:07,747 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:07,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 49 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:57:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-23 13:57:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-11-23 13:57:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 59 states have (on average 1.3220338983050848) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2022-11-23 13:57:07,749 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 20 [2022-11-23 13:57:07,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:07,750 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2022-11-23 13:57:07,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2022-11-23 13:57:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 13:57:07,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:07,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:07,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 13:57:07,751 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:07,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash 855524643, now seen corresponding path program 1 times [2022-11-23 13:57:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:07,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368119645] [2022-11-23 13:57:07,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:07,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:08,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:08,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:08,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368119645] [2022-11-23 13:57:08,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368119645] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:08,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:08,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-23 13:57:08,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660528124] [2022-11-23 13:57:08,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:08,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 13:57:08,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 13:57:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 13:57:08,315 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:08,980 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-11-23 13:57:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 13:57:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 13:57:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:08,981 INFO L225 Difference]: With dead ends: 91 [2022-11-23 13:57:08,981 INFO L226 Difference]: Without dead ends: 91 [2022-11-23 13:57:08,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-11-23 13:57:08,982 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 215 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:08,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 109 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:57:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-23 13:57:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2022-11-23 13:57:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.3015873015873016) internal successors, (82), 76 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:08,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2022-11-23 13:57:08,985 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 21 [2022-11-23 13:57:08,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:08,985 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2022-11-23 13:57:08,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2022-11-23 13:57:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 13:57:08,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:08,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:08,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 13:57:08,986 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash 751460269, now seen corresponding path program 1 times [2022-11-23 13:57:08,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:08,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373009322] [2022-11-23 13:57:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:09,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:09,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:09,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373009322] [2022-11-23 13:57:09,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373009322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:09,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:09,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:57:09,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787754605] [2022-11-23 13:57:09,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:09,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 13:57:09,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:09,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 13:57:09,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 13:57:09,216 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:09,339 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-11-23 13:57:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 13:57:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 13:57:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:09,340 INFO L225 Difference]: With dead ends: 76 [2022-11-23 13:57:09,340 INFO L226 Difference]: Without dead ends: 76 [2022-11-23 13:57:09,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 13:57:09,341 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:09,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 40 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:57:09,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-23 13:57:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-11-23 13:57:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 63 states have (on average 1.2857142857142858) internal successors, (81), 75 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:09,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2022-11-23 13:57:09,344 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 22 [2022-11-23 13:57:09,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:09,344 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2022-11-23 13:57:09,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:09,344 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2022-11-23 13:57:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 13:57:09,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:09,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:09,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 13:57:09,345 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:09,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:09,346 INFO L85 PathProgramCache]: Analyzing trace with hash 598859370, now seen corresponding path program 1 times [2022-11-23 13:57:09,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:09,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332329194] [2022-11-23 13:57:09,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:09,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:10,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332329194] [2022-11-23 13:57:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332329194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:10,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 13:57:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507349204] [2022-11-23 13:57:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 13:57:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:10,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 13:57:10,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-23 13:57:10,638 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:11,689 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2022-11-23 13:57:11,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:57:11,690 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2022-11-23 13:57:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:11,691 INFO L225 Difference]: With dead ends: 106 [2022-11-23 13:57:11,691 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 13:57:11,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-11-23 13:57:11,692 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:11,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:57:11,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 13:57:11,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2022-11-23 13:57:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.2375) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2022-11-23 13:57:11,695 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 24 [2022-11-23 13:57:11,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:11,695 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2022-11-23 13:57:11,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2022-11-23 13:57:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 13:57:11,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:11,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:11,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 13:57:11,696 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1384731209, now seen corresponding path program 1 times [2022-11-23 13:57:11,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350584162] [2022-11-23 13:57:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:11,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:11,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:11,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350584162] [2022-11-23 13:57:11,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350584162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:57:11,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:57:11,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:57:11,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247074033] [2022-11-23 13:57:11,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:57:11,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 13:57:11,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:57:11,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 13:57:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:11,767 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:57:11,808 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2022-11-23 13:57:11,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 13:57:11,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-23 13:57:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:57:11,810 INFO L225 Difference]: With dead ends: 104 [2022-11-23 13:57:11,810 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 13:57:11,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:57:11,811 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 13:57:11,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 108 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 13:57:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 13:57:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2022-11-23 13:57:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2022-11-23 13:57:11,814 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 25 [2022-11-23 13:57:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:57:11,814 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2022-11-23 13:57:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 13:57:11,814 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2022-11-23 13:57:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 13:57:11,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:57:11,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:57:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-23 13:57:11,816 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2022-11-23 13:57:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:57:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash 175751323, now seen corresponding path program 1 times [2022-11-23 13:57:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:57:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742973400] [2022-11-23 13:57:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:11,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:57:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:57:13,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:57:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742973400] [2022-11-23 13:57:13,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742973400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:57:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895324080] [2022-11-23 13:57:13,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:57:13,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:57:13,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:57:13,211 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:57:13,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0ff23666-fa2f-4b99-bc4b-92ef6c06d608/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:57:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:57:13,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 13:57:13,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:57:13,376 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 [2022-11-23 13:57:13,407 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 13:57:13,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-23 13:57:13,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 13:57:13,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:13,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-23 13:57:13,679 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2022-11-23 13:57:13,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 13:57:13,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-23 13:57:13,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 30 [2022-11-23 13:57:14,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 22 [2022-11-23 13:57:14,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:57:14,244 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 13:57:14,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-23 13:57:14,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 13:57:14,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 49 [2022-11-23 13:57:14,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 37 [2022-11-23 13:57:14,631 INFO L321 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-11-23 13:57:14,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 24 [2022-11-23 13:57:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:57:14,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:57:14,705 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 80 treesize of output 76 [2022-11-23 13:57:22,907 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 13:57:33,738 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 855 treesize of output 839 [2022-11-23 13:57:45,404 INFO L321 Elim1Store]: treesize reduction 444, result has 65.9 percent of original size [2022-11-23 13:57:45,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 17 new quantified variables, introduced 120 case distinctions, treesize of input 946196 treesize of output 897524 [2022-11-23 13:59:03,856 WARN L233 SmtUtils]: Spent 1.31m on a formula simplification. DAG size of input: 1983 DAG size of output: 1871 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 13:59:06,985 INFO L321 Elim1Store]: treesize reduction 8, result has 90.1 percent of original size [2022-11-23 13:59:06,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 486158 treesize of output 486220 [2022-11-23 13:59:19,957 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 1598 DAG size of output: 1598 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 14:00:17,625 WARN L233 SmtUtils]: Spent 7.53s on a formula simplification. DAG size of input: 404 DAG size of output: 404 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 14:00:25,177 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 406 DAG size of output: 406 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 14:00:34,416 WARN L233 SmtUtils]: Spent 7.41s on a formula simplification. DAG size of input: 402 DAG size of output: 402 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 14:01:28,034 WARN L233 SmtUtils]: Spent 8.63s on a formula simplification. DAG size of input: 376 DAG size of output: 376 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 14:01:36,384 WARN L233 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 376 DAG size of output: 376 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)